When I adopted Brynn they said they had to have her anal glands expressed about once a year or as needed. She did the whole rubbing her bottom on the grass today and then I caught her trying to on my rug! Needless to say - that is not going to fly. I have never had a dog that I had to do this to - is it an expensive vet trip? They told me once she starts doing this that usually means they need to be expressed; I am just not familiar with it at all.