How to make my cats vegans, too?

hi, i am a vegetarian who won't eat any meat at all, and its so healthy! plus i think eating animals is wrong. i want mittens & mr. snickers to be as healthy as me, and also i don't want them eating meat. but every catfood i see at the store has fish or chicken in it! some of it even has beef!!! i tried feeding them carrots, but they just spit the pieces out no matter how far i put it in their mouths. is there a brand of catfoot they will eat with no animals in it? or is there a way i can trick them into eating carrots?!?! Maybe boiling them in a chicken broth? thanks.