Today kids and I went out for a walk in woods with cat and dog (Lucy, female). Kids and critters did not even know I was present as I hung back so they could explore. Kids came across two neighbor kids that had a dog with them. The strange dog began going after cat and barking at my daughter. Lucy was not engaged until about 5 minutes after kids met up as she was out tracking squirrels and marking. Then Lucy came barreling in and attacked the other dog in a very big way and it was not about dominance, she was trying to kill it right under nose of the kids. I had to run in from bushes and pull Lucy off. Other dog ran clearly hurt. Lucy has hand in killing two other dogs I know of so this not something to be taken lightly. If Ben were present, then dog would have been dead before I could git there. I am sore from that fiasco and anticipating owner of that dog coming over at some point. Saving grace is altercation occurred in its entirety on our property.
The neighbor kids and mine did not really understand what was going on. Bringing strange dogs in will be guarded against much more aggressively.