Feed them two or three medium to large worms at a time. Worms are good for turtles, but they are omnivores and need a varied diet, so don't make it the only food. Water turtles will eat cooked shredded meats, meal worms, greens like dark green romaine and dandelion greens, which you can float on the surface of their water (and greens make cute hats, as you'll see if they end up on the turtles head as it emerges from the water) and turtle sticks, which contain vitamins. The same rule goes for box turtles and tortoises, too.
Worms are like candy to turtles and can be harmful if they are the only food, so change it up!!
Worms are like candy to turtles and can be harmful if they are the only food, so change it up!!