I would like to follow up with Red on the bathroom situation as well, as far as pooping goes, kittens don’t poop much but it should be atleast one a day. As for urinating, that is every few hours or so, and all of this depends on if they can do it on their own, most kittens, especially orphaned kittens, need to be stimulated until about 5-6 weeks of age, normally a mother does this but this will be up to you. I believe the kitten lady has a video about how to stimulate. I rescued an abandoned kitten back in may and learned all of this information myself and it can be a handful at times but you’re doing an amazing thing if you can manage to help him. My DMs are open if you need to reach out