Once you’ve been tasked with finding the treaties – again, this is referring to the main quest – you will then be able to access the Korcari Wilds. In order to enter the Korcari Wilds, the location you need to go to in order to find the Wilds Flower, you will first need to continue on the main quest which is becoming a Grey Warden. While doing so, you will be given an option to kill the dog – doing this will more-or-less fail the quest entirely. If you’re not a Human Noble, the Kennel Master will first ask you to muzzle the dog. It’s left the Mabari poisoned and the Kennel Master needs you to find a special flower that can cure it. Once you have engaged in conversation with him, he will tell you that a Mabari under his keeping – the previous owner died – has swallowed Darkspawn blood which is a very bad thing. Once in the King’s Camp, seek out The Kennel Master. Also, this quest can only be started before the battle against the Darkspawn at Ostagar. In order to begin the Dragon Age: Origins The Mabari Hound side-quest, you’ll need to be in the King’s Camp over at Ostagar.

Dragon Age: Origins The Mabari Hound - Getting Started

Dragon age origins dog