Can you confirm that when you say 8 oz you're only referring to the amount of protein as opposed to the total weight of the food delivering the protein (meat, eggs, etc)?
Got to be the opposite. 8oz is ~240g and 240g of protein is ~1000 calories. For most people that's ~1/2 their daily caloric needs. If in one sitting you are getting half your daily calories from protein alone, something is wrong.
Sorry that was unclear. 8 oz of meat, fish, poultry, etc (before cooking), not 8 oz of protein itself. It's recommended to not eat more than 200 grams of protein per day on any diet.