Direhorns: WoW Battle Pets
Select a pet:

Profession: Battle for Azeroth Archaeology - Zandalari
Artifact: [Intact Direhorn Egg]

Drop: Primal Direhorn [35+], Primal Direhorn Hatchling [35+]
Zone: Isle of Giants
Approximate Drop Rate: 1 in 60

TIP: You can filter pets in a wide variety of ways using the pet filters. You can even apply multiple filters to really zero in what you're seeking.