not a petsmart tale, but I went to my LPS to buy some live food and plants to try and help my Scuzi after he started to nom his tail. I found a very nice, helpful lady who told me all about the benefit of frozen bloodworms (no live, but this was what she recommended). Then proceeded to take the time to thaw some and feed lots of fishies, bettas, chichilids, angels, etc. Found me some live plants that were still fresh, hadn't been put in their tanks yet, and before she let me head to the cash made sure I had a heater.
Turns out she's a breeder, and going to be stocking my eventual sorority <3