But the fact is - dogs are predators. And you just DON’T KNOW that dog’s intentions. You don’t know if he is capable of attacking without putting on an agressive display first.
dogs don’t put on “aggressive” displays when predating. Because they are not being aggressive. Chasing down and killing prey isn’t “aggression”. Often predating dogs have body language similar to happy, playing dogs.
From my own “How to deal with loose dogs while riding a horse”
-Expose your horse to friendly, calm, horse-savvy dogs as often as you can. Invite your friends to bring em over and turn em loose in the arena if necessary.
-Most dogs have never seen horses and are afraid of them. If the dog is barking, snarling, hackles raised, some kind of display, the dog is terrified of the horse. If you turn the horse to face the dog and calmly tell the dog to knock it off and go home and then start slowly walking forward towards the dog, most such dogs will turn and run. Unless the dog thinks you are on his property, in which case there is a remote possibility he will attack the advancing horse; so if you think the dog may think you are getting into his territory, slowly walking on by while talking in a calm quiet voice may be your best bet.
-The most common way a curious dog will investigate your horse is by coming up behind the horse and sniffing at the hind legs. Dogs think the FRONT end of animals (the teeth end) is the dangerous part, so they go the rear to try to figure out what this thing is. This is fine; I would let the dog have some sniffs if your horse isn’t a kicker, (in hopes that next horse-dog encounter the dog will have no interest in the horse), while talking calmly to the dog, and then very slowly start walking away.
-NEVER move away from a dog at speed. Walk very slowly away. Speed of any kind may trigger predatory chase n bite behavior.
-NEVER dismount and attempt to capture a loose dog you don’t know. Good way to get bitten.
-Be especially careful with herding dogs. They may attempt to herd your horse, a behavior that is similar to predatory behavior- circling, chasing, nipping. You can try meeting their eyes and telling them to knock it off, or try some common commands like Down, or just stand your horse still in hopes their instincts will quiet down in the face of a non-responsive animal.
-Do not attempt to train, scold, discipline, or whip other people’s dogs unless you are in fear for your life, since many Fido Owners will become irate and the encounter will go downhill from there.
-Most Dog Owners know diddly-squat about horses, and would like to be instructed in how to act around them, and would really like their dogs to behave appropriately around horses. Being calm and friendly while being informative (Hi! can you heel your dog past me on the right side of the trail? THANKS! Or Hi! Can you please just keep walking instead of hiding behind that bush, the horse gets scared by people hiding!) goes a long way.
-Scolding Dog Owners about Leash Laws, even if you happen to know for 100% certainty there is one in that particular location, never goes over well. Usually the owner knows full-well he’s in violation and doesn’t care to be reminded, or he knows that there isn’t one in effect in that location and you are just being an irritating PITA.
-Flexis can cut your horse’s legs to the bone. If a dog on a flexi tries to run around or under your horse your best bet is to panic. Oh wait, no. Rapid dismount and with gloved hands gasp flexi cord might be your best option.