Fence Fighting
Some dogs can develop a condition called “fence fighting” where they become agitated and aggressive towards other dogs that they can see through a fence or window. This behavior is most commonly seen in territorial breeds such as the German Shepherd and Rottweiler.
The cause of this behavior is not well understood, but it may be related to the dog’s instinct to protect its territory. This behavior can be dangerous if the dog becomes too aggressive and can lead to injuries.