This occured today and really freaked me out? He had been out free ranging, just sitting at this one spot for a while VERY bright and colorful but he was also puffed up and opened his mouth for a second, so naturally i thought he was grumpy cuz he had to go back. When I put him in that's when i noticed the slight head bob, he was still bright and colorful i even noticed some spots i had never seen before on the side of his head ?He would bob like 3 times every few minutes and seemed very vigilant and active, a lil over 2 YO