I just got a bag of rodents this size from big cheese and there are 20 in the bag. If Matilda gets to big for this size before I run out, I just assume that I will feed a bit more often (2x/wk instead of 1x/wk) until they are gone and then increase the size when I order again. Same goes for my baby ball. He's eating rat fuzzies and they come in packs of 25, so I figure if he outgrows them before we run out, I will just feed more often and then increase rat sizes. Hope this helps.