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Another low tech solution:

feed them occasionally on your balcony… birds are smart and they will not poo in their food plate.

Cooked pasta works well, nothing will be left when they leave.

Hard disagree, or our pigeons are especially daft. (To be fair, ours are wild Mourning Doves), but they crap all over the food and water receptacles we have out for a variety of birds.

I was under the impression that birds have no sphincter so they can't control when they poop. Is this not true?

Wouldn't it then always slowly leak out rather than become one big glop?

Some birds do, some don't.

Source: my pet duck didn't have a sphincter.

Pro tip: don't get a pet duck

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