Denver Health--rotating shifts?

My fiance has a couple of job interviews in Denver. I am always the eager beaver and have already started looking at hospitals/job openings. I noticed at Denver Health they put "Rotates" for all of their nursing job openings--they never say if it's days or nights, 12's or 8's. Does anyone know why they put that? Does Denver Health have rotating shifts (as in, one month on nights, one month on days, etc). I've heard so many bad things about rotating shifts.

I'm also thinking about doing PRN at one or more hospitals. Do many of you guys do PRN or all full-time jobs? Just wondering if it's a problem getting hours or not. My experience is primarily Mom/Baby and NICU, if it matters.
Thanks!
Vanessa