Shedding is perfectly normal and keeps your dog’s coat healthy and appropriate to the time of year. But it can be managed by regular grooming using the right brushes that can also help to reduce shedding. However, if your dog is an excessive shedder, or he loses his coat out of season, it's worth taking him for a vet check-up. His diet, his living environment, stress and even underlying health conditions can cause excessive shedding, so you need to find the cause.