My cat has bald spots and no fleas. What else could cause hair loss?

Question

Matcha has these bald spots on his coat but he is negative for ticks, fleas, and mange when we took him to the vet. We were told to not let him out first and be more strict with his diet for 2 weeks. Seems like nothing has changed. He will be tested for hyperthyroidism if this does not work. Could it be something other than hyperthyroidism because he is not showing any symptoms of that. Pet's info: Cat | Domestic Shorthair | Male | unneutered | 1 year old | 2 lbs

Shaneez Wallani, DVM · Accepted Answer

Hair loss can be caused by bacterial, parasitic or fungal infection, dietary or environmental allergies or sensitivities, immune system disorders, or a combination of the above. One common cause can be infection by mites that can live in the hair follicles and lead to hair loss, and secondary bacterial and fungal infections that can develop. I recommend having him see your vet again, as the vet may want to look at a sample from the area (taken by a procedure known as a skin scraping) and examined under the microscope to determine what kind(s) of infection may be present and to figure out what medication is appropriate for treatment. Good luck!

My cat has bald spots and no fleas. What else could cause hair loss?

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