So I'm looking into breeding my own feeders. I haven't committed yet, but I currently have two female rats as a kind of trial. If I can keep them without too much obstruction (read; if my home doesn't smell nasty), I wouldn't mind having a small breeding colony. If not, that's two less frozen rats I have to deal with next week. So far I've already come up with some issues with these two individuals...

They're both fairly docile rats, but I keep hearing her sneeze and snuffle. This morning when I checked on them the bigger one had her eyes closed, looks like some kind of mucus was keeping them from opening easily. They opened after I held her for a bit, but I don't know what to make of that. I've only had them since Wednesday, and the one started the snuffling in the car home, so I don't think this was anything I did, but then I don't really know enough about rats to say for sure.

Should I scrap the breeding plans and just order bulk frozen online? Should I just scrap these two and aim for some healthier girls? Is the snuffling/mucus even something to worry about, or can it be easily fixed? They came from Petco, which I know isn't where I should be buying breeders, but I can't find any other places that sell rats anywhere near where I live.