I believe it varies from snake to snake, but usually once the eyes clear you've got about 2-3 days. At least that is my experience. You can offer food, but a lot of snakes won't eat while blue. Whichever you're more comfortable with, it won't hurt to wait a week. I said my bp always ate and then right after I said that she refused a meal, while in shed. Gotta watch what I say, just like kids to prove you wrong.