My mom works at PetsMart and often tells me of customers who expect her to lift heavy ass things out of their cart. My mother also has a bad back. Then the CUSTOMER gets an attitude.

This employee shouldn't have gotten an attitude with you, but instead should have called someone who can handling picking that stuff up. Some people just aren't very understanding at all.

I'm sorry you had such an experience. But I certainly wouldn't let just one bad-attitude employee discourage me from shopping somewhere.