Posted: Wed Apr 29, 2009 10:32 pm
For young growing turtles a one inch difference in size isn't huge. Genetics plays a role, and maybe one is simply a faster grower than the other.
That said, be sure and monitor their eating and be sure one isn't hogging more than his fair share. If he is, you can take him out of the tank and feed him in a separate container and let the little one eat his fill in peace in the tank.
Another thing to do is have stool samples checked for parasites. Could be one has an infestation that the other hasn't picked up yet, or else it's more advanced in the little one. A check for parasites isn't difficult for a vet to do - shouldn't cost much. In fact, it doesn't strictly speaking even have to be a herp vet that does it. Just take your regular vet some samples and see wht he/she has to say.
One more thing - watch to see if the big one is intimidating the little one. Stress from being bullied can cause a turtle to eat less and generally not thrive.
SpotsMama