Duck feeding can cause problems. Overfeeding can lead to environmental damage. Bird droppings can increase algal growth in lakes and harm fish populations. It also affects their natural behavior making them more dependent on humans for their food source. Angel Wing is a disease that is acquired by a diet high in carbs. It can cause their feathers to grow faster than the development of their supporting bones., thus rendering them flightless. Bird droppings in the water also increase the bacteria levels which can affect human health. This includes swimmer’s itch. So please avoid feeding the ducks. For further information, please read this excellent brochure found at:
https://www.eugene-or.gov/DocumentCenter/View/3408/Waterfowl-Feeding?bidId=