Just my quick 2 cents:
I won't go to Petsmart anymore because they stopped carrying any and all "feeder" animals. They caved to a PETA type campaign to stop the big chain stores from carrying them. Petco didn't give in and still carries feeder mice, which I need for my snake.
I know it's totally unrelated to your issue, but I think we should support businesses that hold the line against the PETA types that would destroy our sport if they had the chance.
Glad your dog peed on Petsmart!