Re: Bread...
Apparently that's an Urban Myth, and swans are actually starving to death because people have stopped feeding them bread because of it.
https://www.inyourarea.co.uk/news/readings-swans-may-not-survive-the-winter/
https://www.bbc.co.uk/news/av/uk-england-berkshire-46440809/animal-welfare-starving-swans-can-be-fed-bread