Why are my pet mouse's white ears and tail turning orange and scabby?

Hello! I'm sorry to hear that Mickey is having some skin problems. Skin issues are not all that uncommon in mice, the location you mention (the ears) is common for irritated skin. The eye problem probably did stem from him scratching at his ears - sometimes they accidentally scratch the sensitive tissue around the eyelids and cause irritation unwittingly. The best thing you can do for Mickey is to trim his toenails - many skin and eye issues in mice are self-inflicted, and having short nails keeps them from being able to cause further damage. A small human nail clipper works well for this purpose, but if you are uncomfortable with restraining your mouse safely, a vet's office can do it for you. They may also be able to suggest an ointment for the irritated ear tissue. Additionally, they can check for parasites that might be causing him to scratch - this is unlikely, but worth ruling out. In the meantime, to protect the eye, a plain artificial tears ointment that you can get from the drugstore can be helpful. Be sure it's made for the eyes, and that it doesn't have anything in it except for mineral oil and white petrolatum. Good luck, and I hope that little Mickey gets well soon!

Monitor for redness, bleeding or excessive scratching. Clean and sanitize the cage and cage furniture. Discard anything that cannot be sanitized. If the bald patch increases in size or if she develops any of the above symptoms, have her examined by your veterinarian or a vet experienced in treating pocket pets to diagnose illness or injury. If she has cagemates, monitor for barbering (over grooming by other mice).

First of all, Maizy looks more like a rat in the picture, unless she is an extremely large mouse. the lesions looks like a wound at the moment, but if it started as a lump it could be an abscess or a tumor. you will have to take her to an exotic vet specialist to get this checked and treated, if it is an infection she will need a course of antibiotics in order to heal properly.

Are you sure she is self mutilating? Mice can sometimes do it to other mice in the cage. It is called "barbering". It is basically overgrooming. If she is self mutilating, potential causes could be stress, infection, malnutrition or overcrowding. Since she has open wounds and other injuries, she should see a veterinarian. Antibiotics may be indicated. You may want to consider separating them until the underlying cause is diagnosed and she recovers.

This could be local infection or trauma caused by a cagemate. Separate him if you can and see if the hair loss resolves. Use as dust free a bedding as possible to prevent sneezing. Monitor for lethargy, nasal discharge or decreased appetite. He may need to be physically examined by your veterinarian to diagnose respiratory infection and have antibiotics dispensed.

I wouldn't be overly worried about this just yet. I suggest you monitor him to make sure it doesn't worsen or that he doesn't get any more lesions. If he does, then he should see a vet for treatment.

This looks extremely painful and could be due to trauma, infection (fungal, bacterial or parasites) or even metabolic disease. Your veterinarian will be able to perform tests to properly diagnose Alexander and prescribe appropriate treatment.