Sometimes that strikes me as over-reaching. The piece that seems most straight-forward is diet. Based on tooth shape, we should know something about what they ate. Then this comes along. Teeth indicate that they would not eat grass, but scat says they did. Cats and dogs, both obligate carnivores, sometimes eat grass, for whatever reason.
Cats eat housplants to be mean.
We grew catnip, they ignored it and ate everything else.