Co-worker sleeps on the clock at vet hospital - seems very unfair
I work at a vet hospital as a vet assistant, my job usually entails holding dogs and cats, nail trims, baths, cleaning absolutely everything in the hospital, restocking, and being available to help the techs and vet when they need it. I have only been working at this location for 6 months and my coworker has been working here for over 3 years. Over the past 6 months I've noticed that she will just sit and essentially "hide" in the downstairs bathing and storage area for sometimes hours on end. Recently, I noticed that she clocked out for her usual lunchbreak (about an hour) clocked back in then left to go run her own personal errands for about an hour and a half. Just today she took her lunch break, clocked back in then went downstairs and took an almost 2 hour nap on the couch downstairs. I don't know what to do as it seems very unfair for everyone else who works at the hospital and especially me or the other vet assistant who works when I'm not working. Just today I had cleaned the surgery room, fed and walked the dogs, and assisted the vet techs in the time that she was napping on the clock. I'm nervous to tell anybody about it because I'm the most recent hire and don't want to be labeled as a snitch.