Herd panic, not solo panic
Quarter Horses are bred to be steady, sensible ranch horses, and most are — alone. The fireworks-night risk with this breed is group dynamics. Horses take their alarm cue from each other, and one reactive horse in the herd can light the fuse for all of them. When the group runs, it runs with Quarter Horse acceleration: this is a breed built to sprint, and a frightened herd covers the length of a field in seconds and arrives at the fence as a group, pushing the front horses into wire they would never challenge alone.
Keep the group together in familiar ground
Do not separate your Quarter Horse from his herd mates for the night, and do not move the herd to an unfamiliar field. Keep them in the paddock they know best, where every horse has already mapped the fences, the gate, the water, and the rough ground. Bring them in together at the usual hour, in the usual order, and let the herd settle as a unit. If one horse in the group is known to be highly reactive, that is the horse to stable indoors with a companion next door — removing the fuse protects the whole herd.
Gates and chains before dusk
Walk every gate the herd could reach and chain the ones that lead toward the road; a latch that holds against a leaning horse may not hold against three horses bunching into it at a run. Check that field shelters have no loose sheeting to bang in the wind and add to the noise, and move anything a running horse could strike — troughs belong against the fence line, not in open ground where a blind gallop crosses them.
Feed, water, and nothing new
Fireworks night is not the night for a new feed, a new field mate, or a first night in a new barn. Feed the herd's ordinary ration a little early so bellies are full before the noise starts, make sure troughs are full, and then leave them to be horses together. Full, settled, grouped horses with nothing novel in their world are the combination most likely to stand, stare, snort — and stay put.
Searching smart if they do scatter
Check the herd at first light and count heads before you do anything else. Look for the quiet injuries: wire cuts low on the legs, a horse standing apart from the group, stiffness when they walk to the gate, untouched feed. A horse who is lame, not eating, or showing colic signs such as pawing and flank-watching needs the vet that day. If horses are missing, work the likely lines — along fence lines, toward the home barn, toward other horses — and get the word out immediately rather than after hours of solo searching: the Lost Pet Alert System on each missing horse's KinsLe profile costs nothing, the map displays its alert, and a finder who catches one can send you a direct message.