How often you should brush your dog's fur depends entirely on the type of hair they have. If you have a dog with short hair then they will need to be groomed less frequently compared to long-haired dog's who should be brushed at least once per week to prevent matted fur. The frequency of brushing also depends on how prone your dog's fur is to shedding, if your dog sheds a lot of hair then more frequent brushing will help to prevent an excess from falling out around the house.