Hi there, We just bought a place in the country, our new neighbors are about 4 acres away. They have 5 dogs that come to our place, harrass our dogs thru the fence, poop in our yard and growl at DH and I. We talked to the other neighbors about them and everybody is unhappy with the dog situation. all of the rest of the neighbors including us keep our dogs contained on our property. We have taken to shooting the shotgun everytime we catch them in our yard. I have noticed they are starting to become scarce. Maybe the owners are thinking we might really shoot them. Of course that would be a last resort. Agressive towards children I would call the sheriffs Dept. It is not fair that your child can't feel safe to play in his own yard and a 4 year old might not recognize agressive behavior until its too late. I would discuss with the adults the 18 year old may not be telling all she knows. As horrible as it is you may have to explain to your children that not everybody are nice people and it may be better to stay away from them. Good luck.
Micah
Micah