My cat Jack is also a terrible greedy eater. He has a full bowl of meat in the morning, then tea time (around 5.00pm) then supper at around 9.30pm. This is all out of the same tin however, I also share out the tin of meat with my other cat Sunny (who is a picky eater and only eats small portions).
However although he is well fed, he still tries to steal from sunny and push her off her bowl, this then puts her off and I worry she is not getting enough.
Jack is a little overweight, with a hanging belly!
On the back of the cat tin label however it does say that cats will only eat what they want and rarely overeat. I do not think this is a case with my Jack!
It's good to know in a way that other cats are fussy with food as I thought I was doing something wrong at first, and not giving them both a good diet.