I'm going through the same thing right now. Rosco is insane about food. Abigail probably only had a couple of days left to live because she was so starved and I know Rosco was hungry but in better shape. Abigail is sweet and gentle when she eats but Rosco becomes a maniac! He will share with Abigail only but growls and snarls at everyone else. If I give him a tidbit of our dinner he will grab it and run and hide with it. He generally darts behind the entertainment center growling the whole way. I keep thinking that this will stop some day soon but so far it hasn't. They were only about 6 weeks when I caught them so you would think they would be over it by now.
I am like Jen and think it's kind of funny but its pretty sad too. I always wonder if he still remembers being that hungry. Abigail has every reason to be that way but she's not.
It has to be hilarious to see that tiny little Mouser doing that!