I read this also:
Dogs are extremely sensitive to onion toxicity so it is best avoided to fed in any quantities. Onions cause a particular type of anaemia due to damage to the red blood cells of dogs.
the toxic doses can be as little 15g/30kg in dogs. If onions are fed at a greater then 0.5% of your animal body weight then toxic effects are alway noted.
A chihuahua would need 30g of onion, a labrador of 30kg would need 450grams of onions. However to be safe. I would not include any in your dog receipies.
But don't know how true.![]()