You said you had bowel issues that didn't seem to go away, but after eating more fiber they did go away. Fiber is directly indigestible. But indirectly, the gut bacteria, produce vital fatty acids from it. Indigestible carbohydrates like fiber, resistant starch, inulin, and others.
To some people minimal amount of animal products could be 300-500 grams of meat-organs-fat a day. Some up to 1kg a day, some 100-300grams a day or less.
People differ, bodies differ, metabolisms differ - and so needs differ. (A physically more active body also needs more animal products than one that is less active.) "Minimal" is determined by any individuals' body, not by anyone or anything else. Especially not by anyone who says things without seeing the true picture-meaning the words form and without understanding how those pictures-meanings fit into reality or not, and without first even seeing the "cornerstones" of our reality - the working "pattern" of our world.
Generally speaking, too low animal product consumption leaves the brain and nervous system with functioning issues, up to severe damage depending on how long the deficiencies occur, and up to potential lethalities.
But eating too much animal products is not good either.
That you start eating something less or more, does not necessarily mean the higher amount of one was the issue, or any other possibilities. You eat something more, but notice issues; then eat the first less but something else more, in the beginning no issues because have abundance of the first, but over a period issues start occurring again. Then what? Switch back? Maybe the problem was not the bigger amount of the first, but the too low amount of the second?
What seems to be the problem, might not always be the problem.
Best not to follow anyone or anyone's sayings, and instead find yourself, listen to your own body and learn to read and understand your own body. Others' sayings and thoughts can be of help when finding oneself, but they should not be just followed like some religion.