Why is it bad to feed ducks bread?

Bread Means Trouble for the Environment, Too

The bread can grow mold which can make ducks sick. It can also contribute to algae growth in the water, which can kill animals and spread disease. Algal blooms can also do damage to the water quality and native aquatic plants of the river or lake.

Is feeding bread good for ducks?

Yes, the ducks are cute, but giving them bread can cause health problems and negatively impact their environment. Bread is high in carbohydrates and has little nutritional value for ducks, which require varied diets to live healthy lives, says Kristin Norris, a veterinary technician at VCA Bridgeport Animal Hospital.