You can find a whole bunch of dog food recipes on the internet, so why don't you try one of them out? You could choose one and cook a special dinner for your best friend. You will also have fun watching them pace around the kitchen, wondering what's up. Imagine their faces when you put a fully cooked gourmet meal down, cooked specially for them.
Most areas have a local pet store that sells a bunch of things that your dog might find interesting. The next time you decide to go to the store, why don't you take your dog with and make a quick stop at the pet store? You two can take your time window shopping and your dog will give you an idea of what their next present should be.