Difficulty: Moderately Easy
Step1
Check the eyes and nose for any type of discharge. If you see signs of discharge, then most likely your pet mouse has a respiratory infection.
Step2
Watch the mouse's behavior. If you see one of your mice acting out of sorts that can also mean that they have a disease. You may see a decreased appetite or lack of activity.
Step3
Assume that your mouse has a skin condition if you see it scratching or its skin begins flaking off. These signs indicate that the mouse has mites or lice.
Step4
Separate the mouse if you suspect that it has a disease. You don't want the condition to spread to the other mice. Also, practice good hygiene when handling a sick mouse. Wash your hands, wear gloves and clean the cage that houses the sick mouse.
Step5
Take your mouse to a vet. If you are concerned about a possible disease in one of your pet mice, then find a vet and ask her advice.