Check out Layne Labs as well. They have very high-quality rodents, with tails and feet tucked against the body so you don't have to worry about having broken or missing limbs/tails. They also don't pressure you to fill up a box like RodentPro does and offers feeders in smaller quantities. I've only checked out RodentPro and they generally offer nothing in quantity smaller than 50 or 100 to a bag. You can get as few as 10 feeders of any size from Layne Labs, from pinky mice to jumbo rats. I think they're also USDA certified because they provide feeders to sanctuaries and zoos and things. I'm going to be ordering from them very soon, I think.