Quote Originally Posted by sho220 View Post
I've done it plenty of times and never had to go for a vet visit and never had a regurge...
X2. Ever.

They're not sitting there over night. They're thawed, warmed, offered, refused, and frozen again. Total time they're not frozen solid is probably less than 2 hours (maybe a lot less). I promise they're not suddenly crawling with bacteria in that time. Now, overnight and 8 hours or so at 90 degrees in the hotside of the tank? I'd toss.