What is the difference between dog hair and fur, and how can you distinguish between the two?

Dog hair and fur are often used interchangeably, but there is a subtle difference between the two. Hair refers to a single strand that grows continuously, while fur is a dense coat of multiple hairs. To distinguish between the two, you can look at the texture and length of the strands. Hair tends to be longer and finer, while fur is shorter and denser.