I've just done a quick google under "dystocia" and have indeed found some references to dystocia among native tribes(eg:-
http://www.rawpaleoforum.com/exercisebodybuilding/low-carb-and-zero-carb-exercise/msg17548/?topicseen#newhttp://jama.ama-assn.org/cgi/content/summary/101/19/1506 (1933)
This one mentions "a chapter on dystocia among the savage tribes." Which tribes were they, what year(s) were they observed, did they eat HG diets, and were the rates of dystocia found to be higher than those of moderners?
http://www.jstor.org/pss/2844324 - "Traditionally farmers, the Ganda are a Bantu people...." --http://encyclopedia.farlex.com/Ganda
This source supports the case for RPDs and against farm diets, not the reverse. Did you read this one or just post whatever hits you got?
Evidence re dystocia among animals is also present:-
http://www.fao.org/wairdocs/ilri/x5472b/x5472b0g.htm ("Reproductive traits and disease incidence characteristics of Dorper, Dorper x Masai and Masai ewes raised under semi-arid conditions in Kenya")
Dystocia rate among lamb breeds:
Dorper 10.0% [Dorpers are known to adapt well to feed lot conditions which offers farmers an alternative method to finish lambs in times of drought. http://en.wikipedia.org/wiki/Dorper_(sheep)]
F1 Dorper x Masai 12.1%
Masai 2.0%
This appears to look at different breeds of pasture-fed animals, with no comparison to grainfed or wild animals. I didn't say there was NO dystocia among wild animals or pasture-fed animals, just probably less among wild animals vs. grainfed, and maybe less also among pasture-fed animals, based on what the people at the Adams Ranch told me. How do the rates of dystocia among these animals compare to wild or grainfed animals? What were they fed? "They were maintained on natural pastures that consisted primarily of Naivasha star-grass. Once a month the animals were supplied with mineral supplements. Water was supplied freely."
http://en.wikipedia.org/wiki/Egg_bound
No evidence here of equal or better rates of dystocia among grain-fed, farmed animals
I added a 14th source below that did report lower rates of dystocia among grassfed animals and a couple of counter-sources that did not find that. Counter sources seem to be few and far between.
---------------------------------------------------
Since this and other threads keep getting distracted by focus on WAP, I've deleted the two sources that referenced him and relisted the 15 I have below.
I wrote that there are links to modern foods as vs. diets consisting mainly of Paleo foods--I didn't claim that it was "mainly due to diet" and I didn't say "native tribes"--that's a straw man argument I didn't make. Additional factors do not refute the dietary connection, they merely add to it. The evidence seems to suggest that the closer women move to a RPD (more Paleo, less processed, and probably more raw, given the tendency of people who avoid cooked grains and legumes to eat a higher proportion of raw foods) the more likely they are to have unusually easy pregnancies. This should not be surprising to any of us here who have experienced remarkable improvements from a RPD.
Since the modern foods that most Paleo dieters eliminate (grains, dairy and legumes) are mostly cooked or heat pasteurized or otherwise highly processed, and since many of the foods Paleo dieters eat more of (such as raw fruits and vegetables), are less cooked or otherwise processed, Paleo diets by their nature tend to be more raw than modern diets. So even cooked Paleo diets lend some support to the case for the raw aspect, as well as the Paleo aspect, of RPDs.
----------
NON-WAP SOURCES SUPPORTING LESS DYSTOCIA ON PALEO-TYPE VS STANDARD AMERICAN DIETS:
1) A Darwinian View of Obstructed Labor
Robert P. Roy, MD, FRCSC
Burnaby, British Columbia, Canada
Address reprint requests to: Robert P. Roy, MD, FRCSC, 4398 Buchanan Street, #1805, Burnaby, BC, V5C 6R7, Canada; E-mail: robertproy@yahoo.ca.
Obstetrics & Gynecology 2003;101:397-401
© 2003 by The American College of Obstetricians and Gynecologists
http://www.greenjournal.org/cgi/content/abstract/101/2/397This essay discusses the evolutionary biology of dystocia. From a Darwinian standpoint, the high frequency of dystocia observed today seems evolutionarily untenable. Hunter-gatherers, most notably the Inuit [when eating their traditional diet], appear not to suffer from dystocia. It may be that people from an agriculture-based background are, obstetrically speaking, less well adapted to the good nutrition of a modern affluent diet.
2) Question: Is NeanderThin safe during pregnancy?
Answer (by Ray Audette): "As hunter-gatherers have the easiest births and the lowest incidence of birth defects, it is not only safe but is preferred. But before adopting any changes, you must consult your family physician. The pregnant woman craves added nutrients to nourish and sustain herself and her developing baby. The mother's immune system is also working hard to protect mother and child, so care must be taken to avoid the forbidden foods while satisfying cravings by increasing dietary diversity. In this way the nausea common in pregnancy can be greatly reduced if not eliminated."
3) Obesity, waist-hip ratio and hunter-gatherers
LEP Wood (2006)
BJOG: An International Journal of Obstetrics and Gynaecology 113 (10), 1110-1116.
doi:10.1111/j.1471-0528.2006.01070.x
Abstract
Obesity is a rapidly growing global problem. It is not simply the result of eating too much, and not all types of obesity have the same significance. Obesity is in part genetic, and one particularly important genetic type of obesity is the tendency to 'truncal obesity',-that is, a raised waist-to-hip ratio. Such obesity is powerfully associated not only with a tendency to diabetes, but also to cardiovascular disease, ('Syndrome X'). Interestingly, this is the type of obesity seen in every hunter-gatherer (HG) population around the globe. Such people are intolerant of carbohydrate, especially refined carbohydrate, especially in the excessive amounts typically consumed in affluent societies. In such pure HG communities, rates of diabetes can be as high as 50% [and higher], when the 'Western' lifestyle is adopted. Many of us, however, share some of their genes and their carbohydrate intolerance-perhaps as many as 20 or 30% of the world's population. Pregnancy can uncover this characteristic, and obesity and glucose intolerance in pregnancy are rapidly burgeoning problems. Quite contrary to the common nutritional dogma of encouraging regular carbohydrates, it is suggested that pregnant women with a high waist-to-hip ratio should be strongly advised to adhere to a low-glycaemic-index diet. Additionally, many dietary interventions, some of them derived from observation of HG populations, are of proven benefit in reducing the expression of glucose intolerance and may well help in tackling the obesity epidemic.
4) Rising caesarean section rates: can evolution and ecology explain some of the difficulties of modern childbirth?
W A Liston FRCOG
Department of Obstetrics, Simpson Centre for Reproductive Health, Royal Infirmary of Edinburgh
Journal of the Royal Society of Medicine
http://www.jrsm.org/cgi/content/full/96/11/559#REF15[...] Why is it that modern human childbirth is so frequently associated with difficulty? Only occasionally has anyone attempted to explain this. [...]
With huge increases in population and later industrialization the life of modern woman and man bears little relation to that of the hunter-gatherer. Because biological evolution cannot keep pace, man is a hunter-gatherer living in a 21st century world. Admittedly, where selection pressures have been very strong (e.g. malaria and the haemoglobinopathies) there have been genetic changes, but the species retains much of the physiology of pre-agricultural times. Whereas hunter-gatherers went through tens of thousands of generations there have been only 500 generations of agriculturalists and just a few in the industrial era. Physicians and nutritionists have therefore proposed that certain modern diseases, particularly heart disease and type 2 diabetes, are caused by a maladaption to our current lifestyle. Similar arguments can be applied to reproductive health and obstetric performance.
CHANGES IN HUMAN ECOLOGY
There are four chief ways in which this misfit between biology and lifestyle could affect childbirth-diet, population density, exercise and reproductive behaviour. The diet in palaeolithic times was by most accounts richer in protein and poorer in carbohydrate, with a different pattern of fats.8,9 It was also very varied. In particular the carbohydrate component had little refined starch and sugar with much more fibre. The agriculturalists then moved to a diet with less protein and fat, and more complex carbohydrate. The modern western diet contains a super-abundance of food, especially sugar and fat with less protein than that of early upper palaeolithic man. In poorer parts of the world where protein is scarce, food consists largely of complex carbohydrate, but western tendencies and fast food are spreading to all parts of the globe.8,9 [...]
What is not widely known is that the invention of agriculture and the development of settled living had pronounced affects on physical stature. Study of skeletons points to adverse changes in the teeth11 and a general reduction of height.8,12-14 Angel 15 has charted the patterns over thousands of years. Humans were tall in early upper palaeolithic times and did not become as tall again until the late 20th century in Western Europe and the USA. ....
CONCLUSION
Changes in diet, population density, exercise and reproductive behaviour mean that primigravid women are commonly shorter, older and fatter than is ideal for first childbirth. These adverse factors have been well recorded....
Anecdotal Reports:
5)
Date: Tue, 3 Oct 2000 02:57:58 GMT
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Stacie Tolen <tolen4@HOTMAIL.COM>
Subject: Re: paleo & pregnancy
Dear Jeremy,
I am a mother of two, and was a vegetarian during each of my pregnancies-Oops. I am sorry to say that due to the effects my diet had on my uterus and sacrum (and yes I can prove this), I endured a C-section with each of my children. I also suffered severe swelling, extreme fatigue, polyhydramnios, sciatica, and many more complications and such during my pregnancies. Though a longtime vegetarian, I craved buffalo meat like mad. Protein is absolutely essential during pregnancy, 80 mg daily. Conditions such as pre-eclampsia and the dreaded toxemia are attributed to protein deficiency. B-12 (available only in animal ingredients: meat, eggs, milk), folate, iron, calcium and vitamin C are others whose deficiency can cause tremendous problems for the pregnant woman, or worse, can damage the baby. Dairy products, especially those containing traces of hormones (BGH) can cause painful menstrual cramps, and possibly worsen pain with contractions. Soy is especially harmful to the fetus, and I have the child with autistic tendencies who proves that. When I eat grains, it causes problems with my joints (some people get arthritis) and if the pelvic and sacral joints are not functioning optimally, the baby will have problems getting through. While this organization does not speak of paleolithic diet, I do recommend that you check out
http://www.bradleybirth.org for info. on prenatal nutritional requirements and, if you're interested, natural childbirth. Please do not confuse Bradley with Lamaze, they couldn't be more different and I personally do NOT recommend Lamaze or, worse, something wich claims to be a combination thereof. Your baby's mother should begin paying attention to her diet now if you plan to conceive in the next few months.
Best wishes, Stacie
6)
Date: Wed, 16 Aug 2000 13:57:19 -0500
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Brad Cooley <Bcooley@SOUTHDOWN.COM>
Subject: Re: Healthy Babies
Justin,
My first advice for your pregnant coworkers is to read The Continuum Concept by Jean Liedloff (
http://www.continuum-concept.org/) and Our Babies, Ourselves by Meredith Small. These books really don't address nutritional aspects of childcare, but do address other issues that affect health. If they would like breastfeeding information, their local La Leche League (
http://www.lalecheleague.org/) should have monthly meetings and individuals that can provide information and other support. LLL has been a great resource for my wife.
My wife gave birth to our first child in April 2000. Before she started incorporating paleo philosophy into her eating habits, she was unable to conceive. Within 3 weeks of going paleo, she was pregnant...maybe just a happy coincidence. During her pregnancy she gained only 25 lbs, gave birth to a 7 lb 10 oz girl, was walking within an hour of the birth, and dropped 35 lbs within a month (from pre-birth weight). I should point out that she didnt always eat paleo foods, but stuck to it pretty well. Certainly, her diet contributed to a relatively low weight gain, a successful natural childbirth, and significant loss of weight after childbirth. Also, IMO, because she eats a lot of meat, her milk production has been very good while breastfeeding. The baby is always well-fed, and sleeps very well at night.
Oddly enough many of the diets recommended for pregnant and lactating women are near-paleo, but with an emphasis on fruits and vegetables. The same can be said for children.
Let me know if you would like more info.
Brad
7)
Date: Thu, 23 Dec 1999 08:28:23 -0600
Date: Wed, 10 Apr 2002 01:22:32 -0500
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Ray Audette <rso456@AIRMAIL.NET>
Subject: Re: the "perils of childbirth" -- question for Ray
From: Jana Eagle >
> I am just wondering if you have some evidence about paleolithic
> childbirths and death statistics or if you are taking the modern-day
> media images of the traumatic operating room childbirth and
> transferring it onto paleolithic times.
I didn't mean to leave this impression. From studies cited by [Vilhjalmur] Stefansson,
hunter-gatherers have far less trauma and labor in childbirth than do
agricultural women. Just removing the hazards of gestational diabetes often
found in modern women ( resulting in very large babies) would improve these
statistics considerably but I suspect much more is involved.
When Gray-Hawk ( seven on May 14th ) was born, it was without doctors or
drugs. We arrived at the mid-wives['] at 3:15 PM and he arrived at 5:20 after
2 hours of mild labor […]. As my prediction, five months earlier, of the easiest birth they had ever seen came true, the midwives bought six copies of my book.
After one year he weaned himself from his mother and would eat almost
nothing but Pemmican for the next year. About the only exceptions were
watered-down fruit juice and pork rinds for teething.
Ray Audette
Author "NeanderThin"
8.
Date: Fri, 19 Apr 2002 11:07:05 -0600
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Jana Eagle <jana@FIG.ORG>
Subject: toddlers and paleo
Rebecca Fincher <meegok2@HOTMAIL.COM> writes:
> 1. I was reading in the archives a chain titled "pain in childbirth?" that
> interested me because of my experience with PPD (not known to be present in
> tribal cultures or most "traditional" cultures)and because I have had 2
> C-sections (intended to have a natural birth both times). Is Ray Audette's
> wife an isolated example of paleodiet eaters who give birth quickly and w/o
> complications? Anyone else out there? Anyone with experience to the
> contrary? Is there any research on this available?
I can find out more about this, depending on your interest. I do know someone personally who had a very easy, painless birth and was following a paleo diet. I wish I knew of more paleo eaters and their birth experiences. I imagine there are so many circumstances that affect birth that every situation is different...
> 2. I have corresponded some with Stacie Tolen on this subject, but if there
> is anyone out there who has raised a toddler on this diet, I would
> appreciate your input. How do you keep enough calcium in the diet? (Both
> my kids still bf; maybe it's not a concern.) What foods do you prepare that
> your kids like/can eat?
believe it or not, I talked to my two year old and explained that sugar wasn't good for her body, and she doesn't ask for cookies, ice cream, candy like i thought she would. she will ask me if something has sugar in it and if it does she understands that we're not going to eat it. everywhere we go, people are offering her sugar, though. it makes me realize how much candy kids really do eat
we have this little game about food that "grows on trees". if it grows on trees or on a plant, we eat it. so she asks does coconut grow on trees? do kiwis grow on trees? and we talk about all the food that grows on trees.
i prepare almost all our meals at home and always pack snacks to take along on outings. she likes meat a lot, and goes through phases on fruits and vegetables and nuts, where she will really like one thing and eat a lot of it, and then a week later seems "finished" and moves on to something else. the freshest, in season produce seems the most attractive. also she likes jerky.
JAna
9)
Date: Thu, 11 Aug 2005 11:18:49 -0700
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Susan Carmack <scarmack@DOWCO.COM>
Subject: Paleo is in the Bible too!
Hi Kristina and paleopeoples,
....
I have a friend who went completely paleo - no grains - who just had a baby at her house in a tub of water. NO pain. 3 1/2 hours of labour. She is 40 and said it was so easy, she would have 'a million more'. Her husband agreed to one. She has 2 toddlers at home already!! This woman was originally scheduled for a Caesarian … because she almost died last time from heart disease/or an allergic reaction to penicillin.
Is this pain free birth indication that we could be close to going back to the Garden?
> Planting and tilling and harvesting,
> sweating in the fields from dawn to dusk,
> Until you return to that ground yourself, dead and buried;
> you started out as dirt, you'll end up dirt."
The advent of agricultural revolution and the cultivation of grains! This is coincident to Eliots post about the grains for slaves project. We became slaves when Adam and Eve got the boot! Adam and Eve had everything to eat in the Garden, no sweat involved:
(Genesis 2:8-9) . . .. 9 Thus God made to grow out of the ground every tree desirable to one's sight and good for food and also the tree of life in the middle of the garden and the tree of the knowledge of good and bad.
...but it didn't take long to wreck the Place.
Paleobest,
Susan
10)
Date: Wed, 14 Sep 2005 20:21:11 -0700
Sender: Paleolithic Eating Support List <PALEOFOOD@MAELSTROM.STJOHNS.EDU>
From: Mermaid Rose <mermaidxrose@YAHOO.COM>
Subject: Re: Paleo pregnancy
To all the mamas-to-be, congratulations, and thanks for bringing healthy babies to the world. Midwife here, doiing home births for 20 years, water births as well... very ancient practices (duh, lol).
I believe paleo is the way of eating that creates healthier pregnancies. Obviously we are here today because of how we ate. There are pregnancy related health conditions that can be avoided by eating this way...ie gestational diabetes and toxemia (both which are treated by upping consumption of protein).
As far as the fish oil...it is the only supplement I recommend to my mamas....I am just not sure if the amount you are taking may be too much...wish I knew the answer. I would not recommend that much myself. Not based on anything other than gut feelings. I wish I could get everyone in my practice to eat the plaeo way....but alas...there are a bunch of vegetarians in the crowd! I love them all!
Remember to eat frequently...helps keep blood glucose even...helps especially with nausea (for which, btw, I also recommend protein). Snacking is a good way of getting all that. Especially nuts. Since you are wanting snacky foods, a nutty trail mix is a good way to take care of the desire of something crunchy and something sweet (put dried apples or apricots in it). Hard boiled eggs is another quick snack.
If I can be of any help, just write. Happy birthing!! Keep us updated.
Love & Peace
Lillian
11)
-----Original Message-----
From: Paleolithic Eating Support List
[mailto:PALEOFOOD@LISTSERV.ICORS.ORG] On Behalf Of Mrs Caroline Centa
Sent: Sunday, August 10, 2008 4:02 AM
To: PALEOFOOD@LISTSERV.ICORS.ORG
Subject: Re: pregnant paleo?
I was pregnant after I had been Paleo for 2 years. I was reasonably strict too. I got sent to a dietitian because the midwives said my diet was ridiculous and not sufficient. The Dietitian said it was fine. I had to make sure I was getting enough energy, calcium (100g almonds has twice as much calcium than 100mL of milk... we eat a lot of almonds in the form of almond meal. You can also get calcium from Kale, Brocolli etc) and carbs and fibre (lots of fruit, especially dried fruit was good for that).
I survived (although I did eat a couple of 'naughty' things due to cravings at the time) and the labour was very good (I had been told that being Paleo makes your body handle labour better and even though I haven't done it before I have witnessed 3 births and think I did really well - no drugs or interventions and not as much pain as I anticipated). My baby came out very healthy and alert. He was a good weight (6 pound 14) and was only 3 days early.
We have also been bringing him up on a Paleo diet and he is developing in leaps and bounds.
The Paleo diet is our natural diet. It does well for our bodies and our children. We are designed to eat the diet and be pregnant. I am also pregnant again (9 weeks now) and intend on doing the diet fully this time (not succumbing to the cravings). I am hoping by doing it properly the pain will be even less...
12) Paleo dieter, Rachel Matesz summed up the common-sense nature of improved pregnancies on a Paleo diet:
>Date: Thurs, 5 Aug 1999 22:24:40 +0200
>From: Rachel Matesz <matesz@earthlink.net
Subject: Paleo-pregnancy
>Re: Have any studies been done on paleo-pregnancies? Women following a
>paleo WOL
>during their pregnancy.
For: Maria Tomashefsky-Dugan and others. Are you serious? We don't need
any studies!!!! We have 2 1/2 million years of evidence that a Paleo diet
can support reproduction. How on earth do you think we got here? The PWOE
and PWOL isn't new. It's not a fad....it's the longest practiced WOL and
WOE on the planet. Every heard of a 2 million year old fad? Whatever we
modern people have been doing, it's a blink of an eye, a few minutes, if
that, in the context of a 24 hour block of time. ….
13) "RE: Easy childbirth, my own recent experiences are quite positive. My partner does not follow a paleodiet but I did have significant input throughout the pregnancy regarding her diet and she eventually gave birth to an extremely healthy baby boy of 7lb 13oz in May of this year. It was her first pregnancy, she was strong and full of energy throughout and it ended in a completely natural birth without ANY pain relief whatsoever - except for hot towels and getting me into a headlock during contractions!! Shocked My new son is developing very well and shows signs of being physically and mentally advanced already. Throughout her pregnancy (and also now whilst breastfeeding) I ensured my partner ate plenty of grass-fed meats, liver, heart, fish, eggs, bone stock and blue ice cod liver oil. I guess her diet could be considered as WAP-like with an attempted emphasis on RAF (including non-paleo raw butter & cream)." --Michael,
http://www.rawpaleoforum.com/off-topic/easy-childbirth-on-paleo-diets/msg16745/#msg1674514) Easy birth vs Dystocia among animals:
Easy birthing vs. dystocia is even apparent in wild vs. domesticated animals. The ranch hands of the Adams Ranch in Florida said that they leave their grass-fed pregnant cows to handle births on their own out in the fields and there is rarely if ever a problem, whereas grain-fed cattle have much higher risks of complications and tend to require having a farmer or vet at hand during the birth, in case there are problems. Every wild animal birth I have seen on nature shows was amazingly quick and easy, whereas I have seen a grain-fed, barn-cooped cow in tremendous distress from her pregnancy.
15) Here is more evidence of less dystocia among animals who are not grain-fed:
"dystocia is unheard of in [grass-fed Certified] Criollos, and 100% calf crops are common."
http://www.americancriollobeef.com/Rancher.cfm16) "I heard [that traditional Native Americans had easier childbirths] in person from an Amerindian." --William
http://www.rawpaleoforum.com/hot-topics/easy-childbirth-on-paleo-diets/msg17380/#msg17380==================
COUNTER-EVIDENCE
I found some, but not much, and it was only regarding cattle:
1) "There was no difference in rate of dystocia for the free-choice hay vs. the high-grain diet group. Calf vigor was equal between both groups."
http://www.angusbeefbulletin.com/ArticlePDF/ABB0904_limitfed.pdfThey did find a higher re-breeding rate among grain-fed cows
2) Incidence rates of both dystocia and combined reproductive disorders were found to be lower (P less than .01) in herds that were fed cottonseed cake as a winter supplement, but higher (P less than .01) in herds that were fed grass hay as a winter supplement. Herds located in the mountains of Colorado had lower (P less than .01) incidence rates of dystocia and reproductive disorders than herds located in the eastern plains.
http://www.google.com/url?sa=t&source=web&ct=res&cd=1&url=http%3A%2F%2Fjas.fass.org%2Fcgi%2Fcontent%2Fabstract%2F68%2F9%2F2642&ei=K7W2SrPXEZHk8Qa7hcCTDw&rct=j&q=Incidence+rates+of+both+dystocia+and+combined+reproductive+disorders+were+found+to+be+lower+&usg=AFQjCNGcjH-3n_xwcSjUHbknqKp8gRg-DQ&sig2=_U9otKzZJa8VGJ0K5hVEEg===================
Conclusion: based on the weight of the current evidence, dystocia rates appear to be lower among people and animals eating diets that are more biologically appropriate than the SAD/grainfed.
When you combine the above evidence of easier childbirths among women eating diets more RPD-like than the SAD with the Cassidy study that shows that infant mortality was actually lower in a sedentary hunter-gatherer society vs. an agrarian society in the same region in a later period (Cassidy CM. Nutrition and health in agriculturalists and hunter-gatherers: a case study of two prehistoric populations. in Nutritional Anthropology. Eds Jerome NW et al. 1980 Redgrave Publishing Company, Pleasantville, NY pg 117-145,
http://www.proteinpower.com/drmike/low-carb-diets/nutrition-and-health-in-agriculturalists-and-hunter-gatherers/#more-2877), and Tyler's thread on infanticide during the Paleolithic era (
http://www.rawpaleoforum.com/off-topic/infanticide-in-the-palaeolithic/msg11122/#msg11122), it becomes clear that childbirths were probably easier and less likely to result in infant death in hunter gatherer societies vs agrarian societies, whereas infanticide may have been more common among HGs than farmers (and all anthropological sources I've read said the infanticide was usually for band/tribal survival reasons, in the same way that a mother wolf will kill a cub to ensure the survival of the remaining litter, rather than due to murderous impulses).