Please don't buy puppies from the pet shop. You will be supporting not only the trade of dogs too young to be taken away from their mothers, often inter bred and full of disease, you will also be supporting the sale of monkeys and other wild animals, some endangered.
No one needs a puppy, they want one. I am guessing that you want a small pure bred breed but I may be doing you a mis service. Please adopt a dog from QAWS, there are too many dogs in Doha without buying in more.