What if your baby red ear slider doesn't eat but doesn't sleep he stays active?
If he is active then he is probably okay. Try different types of
food to see what he will eat. Check out what the baby turtles at
petshops are being fed (this is usually feeder guppies, *ask the
clerk for feeder guppies and they will show you*). If he still
won't eat keep trying different things. A few things I would
recommed that my turtle ate after he refused to eat would be:
worms, feeder guppies, steak, fish meat, and pretty much any meat
(although raw would be best for a baby). If you just got him then
just be patient and keep introducing food until you find something
he will eat.