Why do groomers often shave your dog? Especially since you say you brush them regularly?
Watch why here:    • How to brush your dog to avoid your G... Â
Well, I believe it comes down to technique and tools. You need to be thorough and methodical when it comes to brushing your dog's coat to ensure you brush out ALL the knots so the coat doesn't matt as the weeks progress. You also need to use the appropriate tools designed for dog's coats, otherwise you're fighting a losing battle. Human grade brushes and plastic combs DO NOT suit your needs when it comes to a dog's coat. They simply do not have the strength to break up a thick coat and brush it out.
Hopefully, after watching this video, you gain insight on how to properly brush your dog's coat so your groomer quits shaving them!
If you have any questions, please leave them in the comments as I am more than happy to answer them.