The just adopted dog that I had groomed by Doggie Dolittle had extremely overgrown nails, at least a year, and a very thick overgrown coat. He was also a little "snappy". The dog was shaved, bathed, and nails clipped without incident- and without a muzzle. The groomer paid attention to all of the details- ears, bottoms of the feet, etc. I am extremely satisfied with the final results and very pleased that the dog was handled firmly enough to control him, without frightening or dominating him.