I adopted 6 two month old Pomeranians yesterday. They appear healthy, but they were fed nothing but chicken layer crumble from birth. The guy who sold them to me said that is how he has raised all his geese, and his adults were healthy and beautiful. I am concerned that there may be medical problems later due to this diet. What do I need to watch for as they get older? I put them on grower with niacin when I got them home. Would you make any other changes to their diet to try to correct earlier diet issues?