So we just purchased 2 more guinea pigs last weekend. The lady said they were 2 girls housed together since birth November 2012. When I took a look I discovered one was a male, the other was a girl. So they have been housed together since birth but wouldn't the girl pig be pregnant by now? She doesn't look pregnant and her stomach feels the same as our other girls stomach. I obviously separated the male pig. Just not sure if she is actually pregnant if she hasn't had babies yet.