While we often call it "fur," it's actually a specialized type of hair with unique characteristics like:
* Density: Dogs have varying densities of fur depending on their breed and climate.
* Length: From short and smooth to long and fluffy, dogs have a wide range of fur lengths.
* Texture: Fur can be soft, wiry, coarse, or even silky.
* Color: Fur can come in a multitude of colors and patterns, from solid black to multi-colored patches.
So, to answer your question directly: dogs have fur (hair) as their covering.