I don't have a dog with a double coat, but I do have a cocker with alot of hair. I just shaved her today and she looks adorable and I am sure she feels better with all that hair off. I shave her every month and I will get bag fulls of hair. Her hair grows soooo fast and there is so much hair and it is really thick. Her hair is a pain to deal with, no matter if you brush her five times a day, every single day, her hair will still matt, which is why I just keep her shaved. When I worked at Petco, we had what you would call a shedless program. You would bring your dog in, and we would bath it and get all the shed out of the hair. This way you don't have to shave the dog and it he/she won't shed anymore. It really does work and it does not cost much. Oh and we got alot of huskies and shephards in for the shedless program.