Woah! That's a big gain. PP Sport made my dogs fat due to the corn. But not all dogs will respond the same. I do feed it to my puppies, but have to change their diet around a year old. I feed more protein, less carbs, but due to the taurine situation, I changed food to Farmina for Linus. Sam gets a HD diet for his SIBO with rice, not corn. When Sam was fat I only changed his diet - more the amount than anything. No corn. One cup twice a day. Occasional raw meal. Higher protein. No potato. He's kept it off for about three years now. So has Linus.