Each of my pigs has lost 3 oz. in the month and a half I have had them. When I got them, they were stuck in a pet store cage and had no floor time and were living on carrots, kale and apples (and hay and pellets and those honey stick treats). They get lots of floor time now and eat healthy foods, lots of veggies, forages and little fruit, good quality pellets and hay and no store (Kaytee) treats. I assume this weight loss is good. They look wonderful as you can see from the photos in my gallery and they eat and are very energetic. They are at 2 lb. even and 2 lb. 2 oz.