Can birds eat onions?
Quick Answer
No
Onions are toxic to birds. They contain a substance called thiosulphate which can cause serious health problems in birds, including damage to red blood cells.

What Is It?
Onions are a type of vegetable that belong to the Allium family. They are known for their strong smell and flavor, and are used in a variety of culinary dishes.
Why It Can Be Risky
Feeding onions to birds can pose several risks due to the presence of thiosulphate.
- Damage to red blood cells: The thiosulphate in onions can cause damage to a bird’s red blood cells, leading to anemia.
- Digestive issues: Onions can cause gastrointestinal irritation in birds, leading to symptoms like vomiting and diarrhea.
- Respiratory problems: The strong smell of onions can cause respiratory issues in birds.
Safe Alternatives
- Fruits: Most birds enjoy a variety of fruits, which are safe and healthy for them to eat.
- Vegetables: Many vegetables, such as carrots and peas, are safe for birds and can provide them with essential nutrients.
- Bird seed: Commercially available bird seed is specifically designed to meet the nutritional needs of birds.