Conan Exiles - Isle of Siptah 2.3 - New Pet: Tamed Yakith Packleader (Greater Yakith)
With the help of some viewers, I found the two merchants selling the Tamed Yakith at the Accursed Citadel. I've had the Greater Yakith for a while and I love it - the beast hits real hard and has a decent amount of health. All in all, a good pet.