Ultrasonic signals are used in training whistles, as a dog will respond much better to such levels.

Never assume because your dog does respond properly in its own environment that it will continue to do so elsewhere.

Once the dog responds as required then offer plenty of encouragement.

The dog will respond readily to its name, and will recognize other members of the family.

The dogs responded to his passage, but didn't try to attack him.

The dogs merely respond to their dancing owners, he said: "The dog just likes the owner being happy."

The dogs did not respond to other people, apartments or restaurants.

The dog responded with what was the nearest approach to a smile of joy that anyone remembered to have seen written on his features.

The two small dogs responded in kind, snapping and growling.

"Having the dogs respond to all these things to do is quite an accomplishment."