After having a horrible experience with "a big name online feeder company" I found a local herp guy who breeds his own mice and rats and buy from him exclusively.
His feeders are beautiful, healthy animals, some of which, especially the fancy colored rats, I'd be happy to have had as live pets as they've excelled anything I've ever seen in the pet stores.
Somewhere around here is a thread I started with photos of the mice who had bald spots, "holes", lumps, weird red 'rashes' and gad-knows-what-else wrong with them and some of them had numbers tattooed on their tails.[WTH?]
I wasted $40 on those mice because not a single snake would eat them.
Unfortunately I couldn't get my money back because I bought them from a guy who had overstock and he was the original purchaser.