My guy is 4 months, he's eating, pooping, and still a ball of energy. However he did this weird thing with his head when I was feeding him dinner a couple days and he just did it again. All of a sudden he'll start turning his head looking straight up with one eye, and keeps turning until it seems like his neck won't let him turn any further. Then he'll stay there for a few seconds, then start leveling out and be dazed for a couple minutes. After that he's back to his normal self. I haven't seen him do it in his cage yet. I wouldn't be worried normally but it looks so unusual and his eyes kind of glaze a little. Am I just a first time mom over thinking or should I be scheduling a vet visit?