Hello! My wife and I have two four-month old RES. Over the past week... week and half, one of them has started coming to their platform and opening and closing mouth every now and then. Yes, I have read MANY posts describing respiratory infections, but mine is not showing any other signs. It (not sure if male or female yet) eats great, swims straight, swims as much as the other, and does not have any mucus/bubbles. I could not find any other answers as to why a turtle would open and close mouth. It does not happen all the time, and have never seen it happen when lights are out and they are sleepin. Does anyone know any other reason that would occur?
They have a huge tank, have a diverse--proper diet, proper temperatures... the works. We take care of them and the tank. We just want to be sure nothing is wrong.
Thank you very much!-David
Oh... as a last question... anyone have any tricks to keeping food from sinking to the bottom? Try to feed them a little cooked chicken... and it drops right to the bottom. Thought about making another platform just a few inches under the surface to feed them on... havent seem either of them hunt the chicken down when it goes down... they just float on the surface and look at me.

