I have noticed lately that my min pin, Charlie, is turning in to a fat little guy. Im not quite sure what to do to help him keep weight off, but all I know is he runs around a lot, so I try to keep him in shape. I know that there is diet doggy food, but he is only four months old and Im not sure if he is too young for that kind of food. Plus I heard froma friend who also has a min pin, that once I nueter him, he will gain a lot more weight. But if he isnt too young for a diet where do I start, and what kind of food do I give him? Any info would help, THANKS!