Animals cannot tolerate salt and fatty stuff like nasi lemak. Better if you feed them kibble, if you worry about money, you can go to a nearby pet store that sells kibble and ask for a few samples. Brands like Avoderm, Acana, Orijen, Royal Canin, Nutro are quite good. Get a few samples and then go buy a pack of Friskies Kitten food and mix together 50/50. Feed this mixture and they will grow nice and plump.

Dogs and cats CAN live together. You shih tzu is still a puppy, so what you can do is slowly introduce the kitten to your dog. Do not put the kitten on the floor, hold on to it at all times and let your dog sniff a bit. Keep the kitten in a room away from you dog. Let them get used to each other little by little.

You would need a litter box and a litter scoop and litter sand. For good brands I would recommend Orijen or Acana, but if you're on budget, Nutro or back to basics will do.