Anyway, I've noticed some different behavior from my turtle recently:
While he has not entirely lost his appetite (he'll beg for food, eat shrimp, and nip at plants and other things within the tank), he's beginning to reject pellets. At least at first. He'll sniff at them, swim away, and find them later (after they've been significantly water-logged) and only then eat them up. That's the first new behavior.
Secondly, he's been opening his mouth above water while on the basking platform. But not wide-open, and, as far as I can tell, not to breathe. He just opens it slightly, like maybe he's chewing on something. He just opens it a very little bit. Otherwise, he breathes fine through his nose (I can tell by the way his "throat" expands and such as it breathes, while his mouth is closed). It's not constant, and only happens from time to time, but it is there.
Finally, he shows no other symptoms of anything. No lop-sided swimming, no lethargy. He might be basking more than usual, but I'm not sure about that.
I'm probably going to schedule an appointment with a vet, anyway, but I'm just curious about what everyone here thinks. Any change in behavior is probably cause to worry, but I was wondering if there might be other reasons for the behavior (change of seasons, getting tired of pellets --I admit his diet hasn't been varied lately, which I intend to correct today -- simply opening its mouth for the hell of it). Thoughts?
Thanks for your time.



