Questions tagged [arrector pili muscles]

What is the purpose of a dog's hackles?

Category: Unique Facts

The hackles on a dog refer to the strip of hair that runs along the spine, from the neck to the base of the tail. These hairs are connected to tiny muscles called arrector pili muscles, which allow them to stand up or lie flat. The purpose of a dog's hackles is multifaceted, serving both physiologic...