Why are there folk sayings that "the poor eat geese and the rich eat ducks" and "the family has a thousand kilograms of food, but it doesn't raise a king with a flat mouth"?

In rural areas, farmers generally keep some poultry, such as chickens, ducks and geese, and some pigs, cattle and sheep, but there is a phenomenon that farmers are generally reluctant to keep ducks in their own homes. Why? Do you know what's strange about this? In addition, it is often heard that the old people in the village say that "the family has 10,000 tons of grain and does not raise a flat mouth king." The meaning of this sentence is that even if farmers have 10 thousand tons of grain at home, they don't like to breed flat-billed kings. Isn't the flat-billed king here a quacking duckling? But aren't ducks so annoying in the countryside?

For chickens, maybe we just need to give them enough food and a slightly spacious henhouse. But for poultry like ducks and geese, they must also have water, because they all need to swim in the water to make their meat more compact. There are also requirements for water sources. First, it should be large enough for ordinary small ponds, but the water quality must be good. If the water quality is not good, these poultry may get sick.

I wonder if we mainly eat duck intestines. Duck intestines are short and straight, so ducks can digest quickly. After eating, you may have your next meal soon. Feeding Abby Mallard chickens several times a day means that the cost of raising ducks is higher than that of other poultry. Not counting feed, food alone cost a lot of money. The key is to eat dorado and make the whole family stink.

Farmers not only value their own value, but also value the added value. For example, chickens and ducks can lay eggs, eat them themselves or sell them. Although chickens and ducks can lay eggs, they can still sell money. But for chickens, a chicken can lay an egg a day. But for ducks, it takes several days to lay an egg. Although duck eggs are more expensive than eggs, they are not comparable in quantity. So the countryside is more willing to raise chickens.