Not enough fibre.
Easiest poop was when I was carnivore(you poop very little amount). Being constipated means you didn't get enough fat. Having diarrhea means you got too much fat that your body couldn't absorb fast enough.
At start of carnivore you'll probably have diarrhea since your body/colon isn't yet used to so much fat/meat. But then you get get used to it (1-4 week).
Here’s a brief explanation from a member of Cornell faculty: http://www.madsci.org/posts/archives/2004-10/1096814276.Zo.r...