You need to get a good slicker brush. Most of them don't work how they are suppose to but if you buy a good one it will get though anything. Les Poochs has an amazing brush that I LOVE!! As a groomer this is the brush I use everyday. They are pricey but so worth every penny and will brush though any matt. I have tried many other brushes and haven't found one that even compares to it. Also DO NOT wash your dog with the matts. They will set in like cement and you will never get them out. I don't recommend dematting rakes on long coated dogs. They break the hair and it will ruin her coat. Don't feel bad about letting her get matted. It happens.
