I have been working at PetSmart part-time (More than a year)
You get to work with animals
Part-time employees are treated like dirt no matter how long you've been there, awful pay, inadequate training, most managers don't know P&P and it's therefore not followed, unhealthy animals, lack of knowledge, the company cares more about making customers happy than the well-being of their animals and employees.
Advice to Management
CARE a little bit more about your employees. Part-timers are hard working people too and deserve just as much respect as full-time associates. Read up on store policies and procedures. It's sad when someone who gets paid a small fraction of what you do knows more about these things and has to do your job for you.