Once they lose the dark baby eyes and they become the mature ones like she has its hard to determine age but its a good guess, she is lovely. You can keep her happy by taking care of her every whim, give her a good diet, a big cage with lots of toys and loads of time out of cage to spend with you and your family. You can find lots of threads here in various rooms on what to feed and not feed, ideas for toys that may be from common things in your house because you don't have to spend a fortune to entertain a grey, sometimes a simple box will keep them busy for a while. Looking forward to hearing and seeing a lot more from Ruby.