Foam at Turtle's Mouth
======================

Copyright by Valerie Haecky. This document may be freely 
distributed for non-profit use, provided this notice is
included.

If this is an occasional thing after eating, or when he is
biting on things, then it's just saliva, especially in box
turtles. If it is persistent and all the time, your turtle might
have a mouth/throat infection and should see a veterinarian
for evaluation.
To help him fight the infection, make sure your turtle is kept
warm enough.