It seems like my kitty Oliver constantly craves plant foods. When I make my rabbit's veggie breakfasts in the morning, Oliver has his nose in everything. He always tries to eat parsley, cilantro, lettuce, and anything green. He never seems really satisfied with these greens though and spits most of them out. Then he goes to my pothos plant and starts knawing on that (the poor plant looks pathetic). Is Oliver missing something in his diet? I feed high quality catfood that is all natural. I've tried giving him some cat grass and he was interested but didn't eat too much of it. I know that there are vegan catfoods out there. Should I give them a try, or is Oliver just being silly?
P.S. Oliver came from outside-he was a stray, so I was thinking that maybe he used to eat a lot of grass and misses that or something now that he's strictly indoors.