Sounds like a nice successful set of feedings...congrats. Just to help you out though, rats are not referred to as "hoppers", a hopper is a stage of development for mice. Here's an excerpt from our brand new Feeder FAQ to illustrate. It includes a link to Rodent Pro which has some great pictures and information on both rat and mice sizes.


1. What are the different names for the different sizes of rats/mice?

Birth to 9 days old - pinks (both mice and rats)

10 to 13 days old - fuzzies (both mice and rats)

14 to 24 days old - hoppers (mice) pups (rats)

25 to 35 days old - weans aka weanlings aka weaned

After weaning (anytime from 3.5 weeks to 5 weeks depending breeders choice) they are both classed by size...small, medium, large, extra-large, etc. RodentPro (www.rodentpro.com) is an excellent resource for a clear idea of what each prey size looks like.

If you are feeding rat pups they can range quite a bit in size from a very small, barely pup sized (around 13 or 14 days old) to a quite large pup almost ready for be weaned from it's mother.