My Shelby used to eat the same amount all the time and then when we moved into our house in June, he started acting like he had a tape worm. He kept eating and then begging for more. AND, he started getting bulkier - which I thought was fat because he's eating more.
Then, I realized, our new house has a huge backyard where he (for the first time in his life) gets to run full force a LOT multiple times a day. Light bulb! He was burning a ton more energy AND gaining muscle (not fat) so of course he needed more calories and was hungry.
I say all of this because it was asked above about how active Dexter is. If he is very active, then he really probably is hungry and needs more food intake
