Another trip to PetSmart

Apollo went on another outing to PetSmart today.  He was more successful than the last time but there was only one other dog in the store.  He barks at things, people, birds, when he is in the car.  Today we worked on the quiet command.  I took hotdogs for treats.  My plan was to feed, feed, feed while the other dog was in sight and stop feeding when the other dog disappeared.  Apollo's plan was different.  His plan was woof once, put his butt on the floor and then wait for a hotdog to appear.  He did very good with his plan, however, having the other dog in his sight is still a problem.  Guess I have to come up with another plan.