to all of the people saying its gross. what do you think dirt is made out of? all dirt is decomposed plants and animals. a dead animal would be great fertilizer. i would definitely do it. there is nothing wrong about it.
well i know some native Americans used to plant trees over there dead. so i guess it isn't too far a stretch. but still i would feel weird getting high off my pet.
c'mon now, you know you just posted this to get people's reaction, hella silly idea, bet you freaked out a bunch of peeps, lol
cremate and mix the ashes in with the soil. there ya go unless someone already said that. that way every one of your plants can get a little bit of cat without you having to chop him/her up. Sorry about your loss though i know a cat is like a family member. i remember i did my spanish project about my cat that passed away in 9th grade haha.