I had to have it done on my poodle. After years of no problems, he had suddenly developed constant, raging infections. We tried everything including weekly emptying, antibiotics, packing from the inside out, etc. I worked at a Veterinary specialty center, so high quality care was readily available. After months of struggling, a very talented animal surgeon removed them. We kept him in ICU for 48 hours, on heavy pain meds, on good pain meds and antibiotics for several weeks, fiber additive for a few weeks. He recovered very well, and we have had no issues since then. It should be a last resort, and done by a vet who has lots experience in this area.