Hi there,
I used to have a Cat before and sell it in one shop in Nasser street that is opposite to Falcon Entertainment Co. on the corner for 600 Q.R. It was a Persian one and this is the photo:

I got again from this shop [sorry, forget the name] also a fish tank that costs me with the cleaning machine+3 fishes+Colored stones+small ship to put in the bottom 360. The tank is quiet big and it is so cool.

Looking for the food, go to Carrefour [City Center & Villagio], Giant Stores, don't go to the supermarkets because the stock there is kept for a while.

The first time you got the food from the shop would be better to know which food is good for your pet, after that look in the mentioned above markets because it would be mostly cheaper.

with Regards