When Your Friends Visit, You Want Your Dog to Sit

Multiple Choice

When your friends visit, you want your dog to sit quietly rather than jumping on them as she does now. How would you accomplish this?

A) First, reward the dog with treats when she obeys your "Down!" command. Then reward her only when she is standing near your friends but not jumping on them. Finally, reward her only when she is sitting quietly.
B) Extinguish the bad behavior by closing the dog in a bathroom when she jumps on your friends.
C) Teach the dog to associate the sound of the doorbell with the acquisition of food so she will be distracted and not bother your friends.
D) Withhold food for several hours after the dog jumps on someone.