I have a yearling, he's only around 4 months old right now and has been doing fine. He has been shedding and eating fine. The past few nights I have noticed him taking his head and part of his body and placing it on the side of the cage/glass and facing towards the top of the cage. I'm not sure why he is doing this and not sure if it is odd behavior or not. I have pics if it would help, just wondering why he could be doing this.