my dog is not gaining weight like he should

Question
Hello. I have a 5 month old red nose razor pitbull. When we got him he was a lot skinnier from being malnourished but he has put on a little weight but not the amount that I think he should. Last time he went to the vet was 02/02/09 because he was rushed to a hospital for cutting a blood vessel in his paw. After that he has not been eating well and this evening (02/08) is the first night that he has eating anything in 2 days. But as I had said I don't think  he is gaining the weight that he needs to or should be gaining. The Vet said he is a healthy dog but to me and my boyfriend he doesn't look like he is a healthy weight....Is there something that we can feed him or give him to help him gain weight and keep him healthy?

Answer
This is a recipie for satin balls, to help dogs gain weight.

5 lbs cheap hamburger (for high fat %)
1/2 large box Total cereal (about 6 cups cereal)
1/2 large box uncooked oatmeal (about 7.5 cups oats)
5 raw eggs
1/2 of 15oz jar wheat germ (about 2 cups)
5 packages Knox unflavored gelatin
5/8 cup vegetable oil (this is pretty close to 2/3 cup)
5/8 cup unsulphered molasses
pinch of salt

makes about 20 patties, he should get one patty with each meal. He will gain weight fast, so watch him to make sure he doesn't gain too much.

Hope this helps