We have/had a Rat/Jack Russell terrier. It would go manic and chase things and you could not control it. One day it blasted past me into the road. As I turned I heard brakes squealing and tires sliding and a thump. Our dog went skidding past me across the tar on its butt, like a kid sliding on ice. I expected severe injuries, but it just shook itself and walked off. I think it the plastic lower air dams on the car.