I applied in-person. The process took 1+ week. I interviewed at Katy Trail Animal Hospital (Dallas, TX) in Sept 2012
Interview
I think the interview process is easy and if the owner likes you then you are in. Be honest and tell your own wants and needs right away or else they will not get met. You had better want to work full time, or forget it.
Interview questions [1]
Question 1
Are you willing to fill in anytime the owner wants you to, without much notice?