We receive a lot of calls at our Austin Dog Training Center from people that want to know if their dog is reactive or aggressive. Most people don't know that there is a difference between a dog that is reactive and one that is actually aggressive. They may tell us "my dog plays with other dogs all the time at the dog park but when he sees a dog on a walk, he barks and spins around at the end of his leash."
This is not uncommon and there can be several different reasons for it. Just because your dog reacts to other dogs on leash with barking, whining, howling, or lunging (and is, therefore, "reactive") doesn't always mean that they'll be aggressive off leash. Many reactive dogs are simply reactive because they lack impulse control and have begun to cope with the excitement of seeing another dog on leash by barking and acting like a fool! Other times, the dog may have learned that frustration or even correction from a collar follow shortly after the sighting of another dog on leash so they go on the offense and bark at the dog as if to say "hey, stay back - I don't want to engage on leash." Of course, we can never read a dog's mind to know what is going on or what combination of factors led to a dog's leash reactivity.
We can; however, take a history of the dog and look at the dog's body language, the type and nature of vocalization the dog does when it sees another dog, and talk to the owner about the dog's history with other dogs to be able to have a better understanding of why the dog is reactive on leash. Then, we begin to get that dog on a management and training protocol to not only change the behavior, but to try to change any underlying feelings the dog has built up with the sight of other dogs. The good news is, even though your dog is reactive if they bark, whine, spin, howl, or lunge on leash at other dogs, this problem can be fixed with consistency, dedication, and humane training.
Cara Shannon, Buddy's Chance, Austin Dog Training