Cook the chicken and beef together in a crockpot on low. Cook the pork in a crockpot also (does not take as long to cook as beef and chicken). Cook until meats are done, and when the chicken comes off the bones. Remove chicken skins and bones, then shred all the meat. Cook the potatoes separately in water.
Put all these ingredients along with the meats in a large heavy duty pot and cook on low for about 4 hours. Stir often to keep it from sticking.