This is gonna be kinda gross, so apologies beforehand. A few months ago a friend needed help, and I ended up taking in their two 'fancy' mice during a time they couldn't care for them. I ended up keeping the mice when she couldn't take them back, and it's been relatively smooth sailing up until now.
One of them (a brown and white splotchy female) seems to have 'hard' feeling guts, and has been having unusually large poops lately. I've resorted to gently assisting her since she strains to relieve herself, and looked up a guide for administering enemas to small rodents and tried that once (and got a lot of poop out). Strangely, she acts almost completely normal, eats, drinks, runs, and popcorns around at night, which I can only assume is that tendency animals have to hide their illness.
I'm worried. I'm a college student and can't afford to take her to a vet, and while she does strain (and hates the enemas), she still seems okay. I can't seem to get the 'hard' feeling of her guts to go away, and I can only assume it's impacted poop. What else can I do? I feel really bad, I don't usually take animals in when I don't think I can afford to keep them, but this was a weird case.