Welcome to the raw club! I feed the prey model raw diet, and my dog gets a chicken neck or a chicken wing section three days a week. The bone meal is the same size as all his other meals. (For example, Gobo dog eats 1.25 oz at each meal, so each bony meal is 1.25 oz or as close as I can get.) I had to teach my dog to chew by holding one end of the chicken neck while he worked on it. My dog is a tall, long, skinny 4 pounds, and he can safely swallow the end of the neck, but he does chew well enough now that I don't supervise him directly anymore. I do always keep an ear on him, though!
Tip: a chicken neck or section of a large chicken wing averages 2 oz. You can weigh a few pieces in a batch and see what the pieces weigh on average, then you don't have to weigh every time you feed!
First time Chihuahua owner with many years of dog experience!