What Is a Undercoat?

An undercoat is a layer of fur or hair that lies beneath the outer coat of many mammals. For example, dogs and cats both have undercoats, as do many other mammals such as bears and rabbits. The undercoat is usually made up of fine, dense hair that helps to insulate the body and keep the animal warm. It also helps to wick away moisture from the skin, keeping the animal dry.

In dogs, the undercoat can vary in thickness and density depending on the breed. Some breeds, such as huskies and malamutes, have very thick undercoats that help them to survive in cold climates. Other breeds, such as poodles and bichons frises, have very thin undercoats or none at all.

The undercoat can be a challenge to keep clean and free of mats and tangles. It is important to brush your dog's undercoat regularly, especially during shedding season. This will help to prevent matting and tangling, and will also help to distribute natural oils throughout the coat.