Guinea pregnancy

Question
Hi! I have two female guinea pigs.  One of them we just got a few days ago and she was with a male at the pet store.  Anyway, she has gained a lot of weight since we took her home.  She does eat a lot but she also poops a lot. :)  She has been biting more the last few days and becoming more dominant over the other guinea pig that we have.  She also has been sqealing more often and changing moods a lot.  Do you think she is pregnant.

Answer
Hi Jennifer

It does sound like she may be pregnant but young females do gain weight quickly anyway. As she becomes closer to giving birth you will be able to feel the babies moving inside her.

Also, weighing her each day should give a good indication.

Andy