Do they cut hair ball off cats

Hello! We do not offer grooming services, but we do offer spay/neuter services at our Spay & Neuter Clinic. You can find more information here: http://www.seattle.gov/animal-shelter/spay-and-neuter

You mean if they spay or neuter? Yes. Do they treat hair balls? No, you should go to a vet.

I couldn't say for sure, but they are terrific people. I'm sure they'd do anything to keep your cat healthy & in good shape.

No. You'll need a groomer or vet for that