A little about myself, I'm 15 years old and I was always fascinated with hunting dogs. My first dog was a Weimaraner so when he died, I decided to save my money. I bought my first gsp, Sonic, and so far I've taught him sit, down, jump, come, and wait. By 'wait' I mean, I throw a treat/food and say wait, he'll wait until I say go. The reason I started this post is because he doesn't seem to gain weight. He doesn't like Pedigree or any of the expensive canned food. It's starting to seem like I starve him because his ribs are visible. I've even resorted to table food to fatten him up, but nothing seems to work. I'd really look forward to some advice, thanks.