Yes, as long as they are both cooked thoroughly. Many meat loaf recipes call for a combination of beef and pork sometimes along with veal to make the meatloaf more moist and flavorful. I use the same...
raw refers to lacking any gear... gear is supportive material to help you lift more, i.e bench "shirts" and deadlift suits... both are very tight equipment you can put on to give you a rebound effect...