[Jemma]

I'm at a loss, I can't understand those people.

install a topped fenced dog run. Since they jump the current fence it is NOT adequate. I would also inquire about the property owners responsibility in cases like this and send a copy to him. The property owners might not want such vicious dogs in their home.

AND tell them it has to have a concrete or brick bottom so the dog can't dig out, which it will. And call the health Dept about the pool, green water breeds mosquitoes. And they carry all kinds of diseases. If the owners don't want to install a closed pen, tell them to put up barb wire where the og jumped your fence. Let them worry about their dog getting caught up in it.
I just can't imagine the pain and suffering you are going thru, and hope I never weill. I think they should be sued. When you own a dog, you are responsible for what they do. They are suppose to be in control of their dog. The fact that they knew their dog jumped the fence and never took precautions so it didn't happen again, shows their clear irresponsibilty as owners. And the hell with the owners of the house. Too bad they are relatives, doesn't mean a thing. They are responsible who they rent too.!!! Sue them too.