Vehicle Chasers. Part III

From the mailbag:
What makes some dogs lunge, some dogs chase, and others run the other way when a car/motorcycle goes by?

Vehicle Chasers. Part II

From the mailbag 

A friend of mine was driving down her street and there was a guy walking his 3 dogs.  One of the dogs got loose and was hit by the car.  The owner took the dog to the ER.  

After returning from the ER, the dog owner told my friend that the dog will be getting her leg amputated.  He said the dog runs after cars all the time; the vet said this probably won't change that behavior.  This was a very sad incident for everyone involved.  

This serves as another reminder to always have our dogs under our control - but is there a way to train a dog not to do this?  Or chase bikes, motorcycles, etc? 

I made my dog hate cars

When were first moved into our neighborhood, I tested out several walking routes until I found one that had the fewest loose dogs.  Unfortunately, one part of that route had a blind curve. Sometimes cars would turn the corner quickly, frightening me. And this made me involuntarily yank on my dogs' leashes.