Might be going into shed cycle. Snakes know before we see any signs of it, fyi. I wouldn't lose sleep over it...watch & wait a few days, bet you see some
cloudiness. Don't offer food to snakes in shed. (some will eat anyway, many won't) Just wait until he's done shedding...he won't starve...& offer when he
again seems ready for food. (lying in wait in the evening hours, peeking out of his hide) Don't keep offering more than once per week in any event, as it
only stresses a snake & makes them less likely to eat.