I wouldn't try to feed again today. It won't hurt your snake to wait until the next scheduled feeding. You might try feeding every 7 days instead of 5, too. Who really knows what's going on in little snakey minds...but perhaps he reflexively killed the mouse, but decided he wasn't hungry enough to go to all that trouble of actually getting it down. (It does look like an awful lot of work, doesn't it? LOL) Anyhow...from my understanding, feeding every 7 days is plenty, even for hatchlings.