Is it ok to feed my snake wild mice if...?

If your snake is a wild type then he would be eating them anyway if he was wild. Wild animals will eat anything. Humans and animals have a much stronger immune system then most people think. Besides if the mice were "poisoned" or whatever, then they would be dead themselves. If they had a disease, then i think they would show some kind of sign. (malnutrition, etc) I've owned at least 40 mice. (i started with 4 and they kept multiplying). But i think freezing them is a good way to stop the bacteria from growing and to freeze them that long is also a good precaution. I'd say go for it.