Do not expose your dog to moving traffic and physically beat him. This is
inhumane and highly unlikely to deter your dog. At best, he might refrain from
chasing cars when you’re nearby, but he won’t learn not do to it when
you’re not around. At worst, you could injure your dog, damage his trust in you
and cause further behavior problems, such as fear and aggression.
Do not purposefully let your dog to take off after a car and then allow him
to hit the end of a long line at a dead run. This could cause severe damage to
your dog’s neck and vertebrae.
Do not attempt to frighten your dog off chasing cars by intentionally
“bumping” him with a car or throwing something out of the car window at him.
You could end up seriously injuring or killing your own dog.
WebMD Veterinary Reference from ASPCA Virtual Pet Behaviorist
The ASPCA Virtual Pet Behaviorist specializes in the resolution and management of pet behavior problems only. Please do not submit questions about medical problems here. Only licensed veterinarians can diagnose medical conditions. If you think that your pet is sick, injured or experiencing any kind of physical distress, please contact his veterinarian immediately. A delay in seeking proper veterinary care may worsen your pet's condition and put his life at risk.
If you are concerned about the cost of veterinary care, please read our resources on finding financial help.