Hi!
I think 7 weeks oop is too young! Just my opinion. I got my last glider when he was 9 weeks oop (I begged the breeder to just hold him one extra week) and I think he was still too young (poor baby). He was so tiny and I felt so badly for how scared he was. By contrast, I got my Gimli and Guenevere when they were about 12 weeks and they seemed scared, but fine. See if you can wait until the joey is at least 8 weeks oop.