it has rabbis
It's a sign of pneomia get medical help ASAP. This could be fatal if not treated in the early stages! Is your turtle eating all his or her foods? Is he or she swimming lopsided? Put the turtle in a separate tank and seek immediate medical care. Raise the water temperature and pray he or she lives.
If your turtle is foaming at the mouth is could be indicative of a serious problem. You should consult a vet.
It has to be at least 4" before it can be sold. There isn't an age requirement that I am aware of as long as it is 4". It is illegal to sell them before they are 4" due to salmonella concerns that small children can put the turtle in its mouth.
I'm not too sure about turtle bites, But a yellow belly biting you is pretty rare, Unless they think your food, In that case, Don't put your finger near its mouth. But if it does bite, I'd go see a doctor if any skin has broke, Or if its swelling or bleeding, Or any side affects.
Foaming at the mouth is not normal in any animal ! Get it to a vet - NOW !
Well, it's probably because it has rabies OR it might be pregnant (if it's a girl, of course.).
No. If you are foaming, see your doctor.
Often, a turtle will keep its mouth open when it feels it needs to protect itself. Yellow-ear sliders will bite and their mouths are very dirty. Always wash your hands after handling your turtle.
When someone or something is foaming at the mouth, it is usually a sign of rabies. They should be taken to a doctor.
Dog has rabies/
Rabies
When it's not foaming at the mouth