The origin of Abrahamic dietary laws is not certain. There is no obvious benefit in terms of hygiene, also not in ancient times (they long predate “medieval” times). Keep in mind that poultry carries a significant risk of salmonella poisoning.
It has been suggested that the origin might have simply been that pigs are viewed as unclean due to their own diet including carrion. Another speculated reason is that rulers might have wanted to promote poultry due to it being a more economical way of raising livestock.
The origin of Abrahamic dietary laws is not certain. There is no obvious benefit in terms of hygiene, also not in ancient times (they long predate “medieval” times). Keep in mind that poultry carries a significant risk of salmonella poisoning.
It has been suggested that the origin might have simply been that pigs are viewed as unclean due to their own diet including carrion. Another speculated reason is that rulers might have wanted to promote poultry due to it being a more economical way of raising livestock.