Hello, a pot of time-consuming and laborious stew is all for good taste. In order to have a better flavor, I suggest you marinate all four kinds separately, because mutton has a strong fishy smell, which will seriously affect the taste of chicken and duck meat. It is really necessary to save trouble. You can mix chickens and ducks with salt water to separate beef and mutton. In terms of flavor, these kinds still have great differences in focusing on taste size, marinating technology, seasoning collocation and so on. It is quite right to blanch the brine before marinating, so that it can give an excellent taste. Feel more at ordinary times, I hope you do better and better.