Caesar has been back and forth to the vet. I read Peter's email below advising Mali's should weigh around 600gm. I've had him 8 weeks now and we are taking care of all the pinworms. Could that cause him to be underweight?? Seems like 245gm for a male mali is way underweight. He is eating good (2 times a day) and I'm feeding him a lot of greens.