Females are around 80 pounds, males about 150. They grow fast at about 7 years old. They are also serious eating machines. 1 of mine eats a large handful of hay, a head of romaine, a banana, and some other misc stuff every day. And I have 2. By the way, output equals input with these guys. They can flood a kitchen when they pee. Mine are paper trained, but they forget over the summer, so when I first bring them in for the winter, I have to put diapers on them for a couple of weeks till they remember.