I applied online. The process took 1 week. I interviewed at PetSmart (New York, NY) in Jun 2014
Interview
1 on 1 interview, simple questions about prior experience with animals, describing personality, what you would do in certain situations, how you work in teams etc etc process took a few weeks after interview to start working
The interview was pretty smooth. There were basic questions asking about your availability and past experiences as well as walking through your resume. Interview was pretty relaxed and interviewer seemed interested in relationship with animals and any comfort/discomfort around different animals.