Loud dog at pet salon near me

There’s a pet salon very close to my apartment and every saturday or sunday, they take in a dog, that barks nonstop. All day. Constantly barking.

I walk by and check inside, the dog groomer doesn’t give a shit. The whole neighborhood hears it and it drives me crazy.

What should I do? I don’t want to call them as it seems like too much confrontation, and it’s happens just once or twice a week. It’s also their client, not a dog they own so I don’t know what I can do here

by Gh0stwhale