Big Cheese is my preferred supplier. If they're out of the sizes I need I'll give them a call and they'll let me know when my sizes are available. It's usually a week or so later. Perfect Prey is my primary back up. Their prices are a little higher than BC but they're high quality. Layne Labs is excellent too. Their inventory and shipping costs are quite a bit higher than all the others I've mentioned. I've been hearing really good things about Cold Blooded Cafe lately. I just wish they had different prey types besides rats and mice.