One of the reasons for dogs shedding very large quantities of hair is that they may belong to a breed that is “double coated”. This means they have an undercoat and the top layer of hair sheds more frequently and more profusely than it does with dogs with a normal layer of hair. A common misconception amongst people is that longhaired dogs shed more hair than shorthaired ones. This may not necessarily be true as the longer strands of hair may well give the impression that the dog is shedding more while this may not factually be the case.
Then there is also the phenomenon of seasonal shedding for some breeds. Certain varieties of dogs shed their winter coats in the spring and if you are the owner of one such breed, you will have to be prepared for large-scale shedding at these times of the year.
Problems of shedding
It may seem to you sometimes that your dog is shedding all year round, instead of in the Spring and the Fall, as is usual with most dogs. You may not be far wrong actually. Dogs which mostly stay indoors have the habit of shedding hair perennially. This is because, with the insulation they get inside their house from the extreme conditions outside, their natural body regulation gets thrown off balance. So when they step outside and experience the sudden change in the weather, their body registers the same sort of change that a normal dog's does when the temperature changes in the Spring and the Fall. Thus there is a light amount of shedding at all times of the year as they go in and out of their insulated houses.
Solutions to reduce shedding

