is my yellow bellied slider turtle sick?
i've had my turtles for about a month and a half now (two yellow bellied sliders) and one eats a lot more than the other and has grown a lot bigger. i cleaned my tank yesterday and today i noticed the smaller one is floating around, not eating anything and has a swollen neck like a lizzard. he climbed out of the container that i was keeping him in while i cleaned the tank so i don't know whether it's an injury from that or malnutrition from not eating enough during the time i've had him or maybe he's sick from the state of the tank before i cleaned it? the other turtle seems to be fine. is there anything i can do to help him?