Hypothetically speaking... who would be liable...
if my neighbor's chihuahua dug under our 6ft privacy fence from the outside, let itself into our backyard and one of our dogs (or all of our dogs) attacked it?
All of the fence is sunk into the ground except the gate, and we walk the inside perimeter often, since we do have a digger. We have a block in front of the gate on the inside where the dogs would be particularly predisposed to wanting to dig.
The other day, my roommate opened the door to let the dogs in and there was the neighbor's chihuahua, parked inside our gate! Luckily our dogs hadn't noticed him yet and he scrammed when she walked outside. I went around the side and found where he had been digging under the gate.
So, we barricaded from the outside as well but my roommate's mini aussie has a high prey drive (turned into a/c for beating up neighbors cats) but it made us wonder where the liability lies if the neighbors dog let itself into our backyard and got hurt!