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My cat has matted fur and dandruff. What causes this and how to fix?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 7 years old | 22 lbs

Cat has matted fur, areas increasing. Used to be just on one side, I could work it out eventually. Then would be on other side. Now big clumps all up back. It's like the undercoat is all tied up in knots. He always did shed a great deal. Does appear to be dandruff like flakes on fur or when pet.

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1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on January 15th, 2020

Poor Charlie! As a starting point, the matted areas will need to be shaved off with clippers - so you can either do this yourself, if you're comfortable, or take him to a veterinarian or groomer to have it done. Once the mats are out, you'll need to either brush him regularly (if he tolerates this), or have him shaved down regularly to prevent him from getting matted again. If this is a new development for him, I would also recommend a vet visit to find out if there might be a reason that he's no longer grooming himself properly. This can happen due to pain, skin issues, or systemic illnesses such as hyperthyroidism or diabetes.

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