Yes, you just cook the oatmeal as you would if you were making it for yourself. When you feed something warm, make sure it has cooled enough. Things that are too hot can result in a burn to the crop. When I am feeding Timber something warm, I make sure it is barely above my body temperature. Be sure to look at the sticky's for the list of "do not feeds" for your baby. There are things such as avocado, chocolate, etc. that you cannot feed your bird at all. As Ray said, expected for the prohibited list, most of us give a birds a little of the stuff we are eating at mealtimes. You will have to experiment to see what your bird likes and doesn't like. They are as individual in their tastes as people are. My TAG, for instance, will not eat oatmeal. Some greys love it. He will eat a lot of other things warm, and loves being spoon fed.