I have noticed the past few weeks that our four girls have been losing weight. I'm not sure if it's that they're losing it running on their saucer or that they are not eating their food. We switched their chin pellets and guinea pig pellets but the food dish is always almost empty. The food that we are feeding them is Rydell chin pellets and Oxbow Cavy Cuisine guinea pig pellets which we have purchased in bulk from a local breeder. We used to feed them chin pellets from the Hagen Explosion chin feed and Hartz guinea pig pellets which had a high molasses content. We are also feeding them a different brand of timothy hay but it's always almost gone too!