Our long haired cat won't let me brush his arm pits and he gets mats. He also doesn't like when I cut them out and I haven't been able to get him used to the sound of the electric trimmer. I have taken him to a groomer where they kept him all day, washed & dried him and shaved his whole underside. The next time I took him to the Vet where they sedated him and shaved his underside but no washing or drying. The washing and drying prior to shaving didn't last any better than just the straight shaving. The Vet office claims that their sedation is safe. My question is which is less traumatic for him?