How much handling should a baby guinea pig have during the day, without so much that it stresses them out? Right now I'm trying to do three sessions for each guinea pig. One handles the handling fine (I've had her for four days) But the other one that I've had for only one day was held once and was stressed and grouchy with the other one for the rest of the day. Or is just that some guinea pigs just deal with it better, and I can handle them whenever I want to and they'll get used to it? Thanks for advice. This is my first guinea pig owning experience. I quite love both of them and really want them to get along.

Also, while I have experience owners attention. Can you recommend a commercial cage that is big enough for two full grown guinea pigs? Right now the babies are just in a starter kit cage which seems almost too small already. So I'm thinking of investing in a permanant cage at the end of the month. I want a commercial cage as I don't want to have to build a CC cage.

Thanks!!!