I have an Eastern Gray that I'm worried may have AP. He's been in my care for about a month, and is approximately 10 -11 weeks old. He's recently started refusing formula,which I know they all do at a point, but now I'm noticing a sound when he's up close to my ears, and I don't know if the timing is just a coincidence. It's not so much a clicking as an almost buzzing or purring sound. I've rehabbed a few squirrels, but never a gray, so I don't know if this is just a noise they make? I have Baytril, but I don't want to dose if not necessary, but I'm paranoid, and don't want to wait too long if it is. He's eating block still, and is still very active. Another question to go with this, should I need to treat him, how do I get him to take it if he refuses the syringe?