I love mine too and can't imagine ever being without them. Love the geese too but they aren't quite as tree friendly as the ducks.
Lawn mowers, pest control and fertilizers all in one in addition to food for the soul.
I still miss my little quackers, the final nail was last June, but we also had stoats and at one point mink. I would rather be without than finding (or mostly not finding and spending hours looking) their poor little bodies, I can't bear the thought of going through that again, and after Calls, to me nothing else can match for character, little ducks who thought they could take on the world
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They did have problems dealing with big slugs - I would go and cut the big ones in half for them,
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Not sure I love the geese though, like watching them occasionally, wish I could tell which were ganders