DS-014 I can't complete the 'Feed Your Pet' quest.

The quest is given by the Pet Merchant.

"Your Pet is sure to be hungry by now. Buy a bag of my Pet Food and try feeding it to your Pet."

Objective Buy a bag of Pet Food from the Pet Merchant, feed your Pet, then go back and see the Pet Merchant.

Quest Tracking

Feed your Pet 0/1 Feed Pet 0/1

I buy Pet Food, I feed my pet, it completes "Feed your Pet 1/1" but it's impossible to complete "Feed Pet 0/1" and therefore finish the quest.

I've noticed that the Pet's Hunger stays the same after being fed. Pet Food should add 200 points to Hunger.

Hunger before fed: 697 Hunger after fed: 697