I would still alert Petsmart of my dissatisfaction and ask that one of their contracted vets look at the snake and make a determination on what the condition is. Ask if they have a herp vet that can make the determination. You are the customer and you have certain rights once you purchase a product. Unfortunately I think it would be a mistake to keep the animal without taking him back to Petsmart for evaluation and treatment or a refund. No way should you spend that much money for a animal that is unhealthy and comes with baggage from day1! The onus is on Petsmart! I think this may be a early scale rot / scale irritation that will require some form of treatment even if it's just placing the reptile on paper towels until the condition resolves. I hope you plan to do a 90 day quarantine of him also if you decide to keep him. Make sure he doesn't come in contact with your other animals. I also think the pied may have a mite condition as evidenced by the red dots and raised scales. I could be wrong but it's something that should be suspected, Good luck. Stay in peace and not pieces.