Ringing Ceders

I have a two years old silky terrier . I had always feed him royal canine. I told that this is not the best food , I have tried Nutro-natural choice and natural balance but he doesn’t like it and throws up a lot. Can you tell me how is wellness and what other dog foods you suggest .  I’ve also considered feeding him a raw food diet, but am hesitant due to the cost and also the amount of time it takes to prepare.  I am also having trouble finding the raw food ingredients.  Can anyone help me find the best food for my dog?