No idea. He's always been a finicky eater, but he's never regurged. I've had him up to small rats, then he'll stop and I can get him to eat if I go back to mice. I fed him a decent sized mouse, he ate right away. Overnight he regurged. It didn't have time to get slimy, so he didn't have it down for very long. Probably less than 4 hours.
Looks like I may have to find a male Pied for this year's breeding. Oh well.
Thanks for the concern!
Jim Smith