Exercise

Is it okay to put my chins in an exercise ball? The lady I got them from said they love it; she let them out every night in it. I don't have an extra room I can devote to just them. And if it is okay, can they both be in it at the same time? She said they did, but I just want to make sure it's okay. They get along very well.







Also, is there a way to tell their age? They're both supposed to be a little over a year old, but one is a lot more active than the other. Is that just personality? :hmm: