It's not a silly question! She's fine.
If she gets sick, her status will show that she's sick. Different pets have different appetites, and as long as they are healthy, you don't need to be concerned. If she ever does get sick, though, be careful with the medicine. You can very easily kill a pet with an overdose. All it takes is two doses too close together. You should wait at least several hours before administering a second dose.
As for her poo, there are a few different "poo graphics" - none of which indicate anything in particular. They just add variety to the poo corner!