I saw something horrifying on Tuesday. I was working with two of my fantastic clients and their Bernese Mountain Dog puppy. I was hired to help McIntire with a bit of fear around men, hand shyness, and other assorted issues such as teaching him to have better off leash control.
Dog Training Blog
Another potential client contacted me a while back to "fix" her dog that she dropped off at a "boot camp" for two weeks.
Barrier Frustration can occur if a dog is behind a window, fence, or on leash and is not allowed to interact with the environment. After a while, she may get frustrated and aggressive. One indicator of Barrier Frustration having a part in aggression is if a dog barks behind barriers and is calm around dogs when off-leash, but is very aggressive behind a barrier or on-leash. Dogs, of course, can also show aggression no matter how much they are being contained as well.