I believe that lick granuloma is the technical term for sucking type behaviours. Flank Sucking Syndrome is a compulsion type of disorder, believed to be genetic, seen most commonly in Dobes. Basically, she sucks her side or hip(flank) for short or long periods of time throughout the day. (It's sorta like a child sucking a thumb-it's a stress reducer) It is worst when driving in the car. She had this problem when we got her from the SPCA at 14 months old, only I didn't know what it was at the time. We tried bitter apple, she gets hard exercise, and also tried Bach Flower remedies. She is a nervous dog with many other fear based issues, but I thought someone might have an idea that I havn't tried yet. She isn't actually doing any damage so far, so I'm not overly concerned about it yet.
Thanks.