Three things:
What brand of dog food? This makes a huge difference, too many dog foods will not hardly support an active dog.
How does his coat look? Does his hair shine or is it dull and dingy looking? A healthy dog shines!
Good idea to ask hound doggers or other dog owners in your area which vet is good with dogs and reasonable priced.
i think you nailed it, i'm going to switch back to the old food i useds to give the dogs. his coat is still shinny, he has gained a little weight in the past week, we've been feeding him our leftovers a little more often.