It's been a while since you posted this message, but wondering if you found another glider to go with your single? I have four girls who I love. One of my girls, Opal, just does not seem to be happy with the other three. Opal is always hissing at them in the pouch, sometimes she pulls on their tails. She is not aggressive, she doesn't fight with them, she just doesn't seem to really like any of them. The other three get along great and are very bonded to each other.
I just don't know what to do. I have taken her to the vet and she is very healthy and the vet could find no indication of any physical problems. I am considering re-homing, but only to a really good home with at least one other glider, not to a rescue. I live in Washington state.
Anyone else reading this, if you have any advise I would truly appreciate it.