I have two notable encounters with loose dogs.
The first was so long ago I don’t remember the nitty gritty details, it was waaayyy back when I and my Old Man were much younger with many fewer miles under our belts. Two dogs, loose, chased him. I nearly got bucked off as he’s trying to kick at them, he’s running, I’m scared, the people I was riding with screaming at the dog owner who kept saying it was my fault for “running” from the dogs. Old Man nearly got one of them with a kick (they were biting at his legs!!) and she’s yelling that my horse is dangerous. This honestly scarred me forever on being around loose dogs I don’t know.
The second was with my Late mare, who was a small-creature-killer. Would go out of her way to kill a small animal, and came close on a few barn cats. We’re riding on trails solo, come across two women with two loose dogs. The pitbull looking one approaches, barking, hackles up - I’m yelling “MAM GET THE DOG” and the lady is running behind him screaming “PIZZA!!! PIZZA!!” with a bag of pizza in her hand. I stayed facing the dog, woman manages to get ahold of him. Ok, cool. Fast forward about 45 minutes, and I’m riding along the edge of a parking lot that ties two trail heads together. Out from between the cars comes this same pitbull dog, and now he’s not bluffing. He grabs ahold of Late Mare’s tail and is hanging on, I’ve pulled her into a tight circle - and I’m yelling again at the woman “GET YOUR DOG GET YOUR DOG” and here she comes again with a bag of pizza yelling “PIZZA PIZZA PIZZA”. My mare is BEGGING to slaughter this dog and I manage to keep her under control that she doesn’t hurt him - I don’t know what gods I pleased to be able to manage that, honestly, she was not the type to take direction. Lady wrenches the dog off my mare, and at this point I’m PISSED THE EFF OFF. I am SCREAMING at her what an idiot she is, how after the first incident she should have kept him leashed, how close she was to losing her dog to a kick to the head, etc. etc. Her answer to all of it was “Well, he’s a RESCUE”.
I abhor the general public’s loose dogs. When a dog is behaved around horses, it’s fun to have a tiny buddy join for a hack, and good exercise for the dog. But the general public’s dog? HECK no.