Both pits liked them
i gave my pits 1 a day (a female rednose 55lbs & a male blue nose 80lbs) and the female did gain weight about 10 days after and the male looked leaner and more tone, when i ran out she immediatly lost the weight and the male looked normal again, so i bought it again, and sure enough she got bigger and he was more tone, and at times their veins and shoulder muscles were more noticable after playing with them, and again when i ran out, about 5 days later they looked the same, even after running with them and playing they didnt have the veins protruding like when they were taking this stuff. and thats because i only gave them 1 per day (bottle says 2/day) They did have more energy, probably more than i was use to, they are a handfull when they want to play tug of war and fetch. So i would buy this again again, 4 stars because price could b better