'On a cat, the arrector pili muscles along the back cause this response to stress'
the hair stand up on the cat\'s back
HEY, MUSCLES!: On a cat, the arrector pili muscles along the back cause this response to stress
On a cat, the arrector pili muscles along the back cause this response to stress
On a cat, the arrector pili muscles along the back cause this response to stress
HEY, MUSCLES!
the hair stand up on the cat\'s back
HEY, MUSCLES!