my hamster has bare patches in his fur. what could they be?

Answers:
If your hamster has patches of missing fur you hammie more than likely has mites, most hamsters and guinea pigs get them from using shavings, it also comes from the breeder that they get their pets from, most little guys like this are bred by animal millers, we see this all the time in our rescue,
it is so sad )O:


I have listed a link and infor here for you.
Demodectic mange: A common external parasite problem of hamsters, is caused by mites that reside within the hair follicles and certain glands of the skin. The mites cause dry, scaly skin and significant hair loss, especially over the back. This disease is rarely a problem by itself and is frequently associated with long-standing, debilitating diseases, such as those involving the kidneys. Hamsters exhibiting hair loss should be examined by a veterinarian as soon as possible. The doctor will do a skin scraping and examine it under the microscope. The presence of mites in the scraping confirms the diagnosis. This disease can be treated, but the patient may have an underlying problem for which there is no practical treatment or cure.

http://www.animalhospitals-usa.com/small.

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my best answer is take him to the vet cause if there is seriously something wrong with him then its better to treat it as early as possible

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Dude dont worry about it if it was me i would get rid of it and buy a new one

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Your little fellow got the mites. You should take him to the vet.(maybe you arent feeding him enough,Or Cleaning his cage enough) Hope I helped!

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Sweat itch, call the vet