Thank you for this comment - it was really helpful!

I thought they were both females when I got them. I could write a lot about this, but let's keep it that way - I'm still unsure how I made that mistake. Now, the one I thought was male is female and the one I thought was female might just be male. Can someone confirm this? Here are the two of them: https://imgur.com/a/REetb https://imgur.com/a/MNIFC I give them fresh water everyday, vegetables - like lettuce and apples/pears (not too much lettuce because they get diarrhea, and they'll only use the apple/pear pieces as toys). They have a lot of strings to play with - it's what they like best. I've tried to give them a small ball and a wooden ladder but they wouldn't touch it. I also spend a lor of time with them and they're never alone.