Good luck at the vet today! (((HUGS)))
Maybe you could put some chicken wire up the fence, something with smaller openings, just in case the dogs are out together again?
I agree with talking to them calmly and level headed, which is not an easy thing to do. I would not bring up your mom shooting the dog again- if you guys are friends with the neighbors, even if they do feel bad, that might make the defensive. I hope they are truly sorry and will do their best to prevent anything like this happening in the future.
Maybe you could put some chicken wire up the fence, something with smaller openings, just in case the dogs are out together again?
I agree with talking to them calmly and level headed, which is not an easy thing to do. I would not bring up your mom shooting the dog again- if you guys are friends with the neighbors, even if they do feel bad, that might make the defensive. I hope they are truly sorry and will do their best to prevent anything like this happening in the future.