Geese guard your garden. When an intruder arrives, he is greeted very noisy. This is sufficient to notify the owners, or when theyre not home, notify the neighbors that something is wrong in the neighborhood.
If they get the chance to swim in your pond, they really mess up, so this time build another pond, without fishes this time, but with water lice to purify the water. Water lice can also serve as food for you guessed it, the fishes.
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