We were unaware that we adopted a male and female guinea pigs. They had 5 babies. We already adopted the male to a new home, but now we need to find new homes for the babies. As far as I can tell, there are two males and 3 females (not an expert). They have all been handled by me and my daughters (school aged) since birth. They will be 4 weeks old on Monday and ready to go to their new homes!! I think they are $85 at Petco. I am just asking $40 to recoup some of the unexpected costs.