I've successfully hatched and released painted turtle nests. Dudes are the size of a nickel and require time to absorb the yolk sacs attached to their stomachs. Even in untouched un-fucked up environments, their fight begins even in the egg. Predators and insects go to town on nests... Legit must've been 100 eggs broken open and strewn all over my yard till I stepped in. It's amazing they found these hatchlings with everything they're up against.