Yes but that's not very good for them and high corn diet will promote growth of bacteria such as salmonella... I assume it's the sugar in the corn that causes this.
The latest research shows that many fats are actually heart healthy for humans, such as coconut oil, avocado, grass fed animal fat... Why is it that ducks can't have high fat diets? Most animals in nature look for the highest fat diet possible. I know nothing about birds but when i heard the...