definitions of the words you questioned:
1. fowl: A fowl is a bird, especially one that can be eaten as food, such as a duck or a chicken.
2. livestock: Animals such as cattle and sheep which are kept on a farm are referred to as livestock.
3. poultry: You can refer to chickens, ducks, and other birds that are kept for their eggs and meat as poultry. Also, meat from these birds is referred to as poultry.
就 "fowl" 跟 "poultry" 而言，其兩者之意義非常之相近，可視為同意詞，皆意指”家禽”或”家禽肉”！