It is illegal to sell the hair of a domestic dog or cat.

The Law

In an effort to curb the grim trade of domestic pet pelts, Delaware strictly prohibited the commercial sale of dog and cat hair, fur, or garments made from them. While this seems like common sense to modern pet lovers, it was explicitly codified to shut down unscrupulous manufacturers who tried to pass pet fur off as exotic materials. Shedding pup hair is strictly for your vacuum cleaner, not the free market.