My son recently read an article stating that the average adult weight of a guinea pig sow is 600-900 g. According to this, mine must be HUGE! Linney is about 1200 g and Sundae is about 1050 g. Even our late pig Frenzy, who I always thought looked tiny, was about 965 g. I realize there's probably a wide range of normal, and I'm not concerned about them as they eat healthy, are active, and the vet considers them to be in good health. I'm just curious how big the other sows out there are!