The ATV spooks all animals within render range, as is the design of it, but both the cape and the water buffalo have about a 50/50 chance of instead going aggro and then chasing you to the ends of the map.
Aside from this being an annoyance for people (like myself) who use the ATV specifically to avoid animals while getting a map unlocked or doing missions, this can also be used to kind of cheese hunting the animals by making them aggro and run at you for an easy (or easier) shot.
Hence my proposal: to still convey that they are Aggressive™️ animals, have their ATV-aggro response be tweaked to about 200-250 meters, and have anything further than that opt to flee instead.