Welcome Darien, your Adonis is gorgeous! As has already been said, it's important to keep him on the same diet the breeder has had him on for at least a couple of weeks until he gets settled in, then you can transition him onto whatever you want, as long as it is a high quality diet, whether it is raw, kibble, canned, or a combination of these... and as long as you transition him slowly, e.g. over a couple of weeks, so as not to upset his tummy.
There are also threads here on how to introduce your cat and dog to each other, you can use the search box to find more info on this as well.