Even though I have 10 veggie cakes in his inventory, it says "put food in inventory to tame" and I'm losing small amounts of taming percentage (but not taming effectiveness). Weird bug, must have something to do with the cool down everytime it eats.
If you are considering breeding these, go slam your hand in a car door a few times. It will be much less painful. Literally one veggie cake per percent of growth....and it grows slow.. Digests roughly one point of food per second, so feed a cake about one for every 7 mins (during event boost) and it will gain one percent of growth.