Dog barks at cars - Answered by J. Sansregret

[schweppes]

I have a Red Lab that is 3 1/2 yrs old. When I get company he barks and when the company comes in the house he goes out and barks like a maniac at their vehicle. Or if we are outside when they come he will run up to their car barking and if I make him Sit, Stay he will just bark anyway and when released he will run right up to it barking and then pee on its tires. He will run right past the visitors to bark at their car. What can I do?