mites on rats

Question
I have two rat that I believe have mites they are scratching and hair is and have little sores

Answer
The most likely culprit is an external parasite such as mites or lice.  Buy a single tube of puppy / kitten Advantage or Revolution from your veterinarian and, using a 1cc syringe or eyedropper, apply a single drop to the back of your rats' necks.  Clean out the cage really well, including all toys and accessories, and repeat the dose in two weeks.  This will get rid of any external parasites on your rats.  To prevent reinfection, avoid contact with other rats and freeze bedding to be used for 24-72 hours before putting it in your rats' cage.  Hope this helps, good luck!