Our Rosie (chi mix, now at The Bridge) was the runt of her litter and the people we got her from said she was "the best eater" of the bunch. Boy, howdy! She was a gulper all her life and an inveterate beggar. Our other dog had been a free feeder (food down all day) and never overate. That had to change real soon when Rosie got here. What kind of food do you feed them? That amount sounds like a lot for 15 lb dogs, unless they are very active. Not being critical, but I know now we overfed Rosie and we might have had her longer if otherwise.