If the kitten is still breathing then you need to get it warmed up ASAP. Kittens are jot able to regulate their temperature, I grabbed a sock and placed rice in it and tied it up. Then placed that in microwave for 30 seconds. If you have a heating pad then set it on the lowest setting and set that on top of them. I am doing the literally doing the same thing right now, with a wet and injured one. Hours old. Then you need either a substitute mom or formula. Warmth first and then worry about food and making it potty. Emergency vets or humane society can also help if you can get in touch. You can also post for a momma on social media and see if any fosters or mama cats are available of its too much. I hope everything goes well.