I paid this Costco location a visit to get my glasses fixed and noticed that several people were walking around with their pups! I never knew you could have them inside, but as long as they're leashed and well-behaved, they don't seem to have a problem. It seemed like it mostly small dogs (like Malteses') so I'd probably leave the pitbull at home. Still, a very cool thing to allow you to shop with your dog! Plus, you can get a nice dog bed on the cheap and grab a hot dog on the way out. Winning!
What's not to love about Costco? They have the best prices on produce and meats. Just expect it to be crazy crowded and deal with it.
This location is pet friendly. The greeter said no problem with bringing Josie Poodle in to shop. Not sure if they'd be the same way with a 70 lb German Shepherd but purse pooches are fine.