GArlic is usually fine-- Onion does not destroy red blood cells, but causes them to develop with 'Heinz bodies' whichinhibit the absorption of oxygen. The chemical that causes the Heinz bodies is cumulative, but is also used up-- once it clears the system, the new red blood cells are normal- Onion doesn't kill the animal the first daythey eat it-- the chemical must get into the bone marrow first, get used up. Most animals don't eat enough to cause enough RBCs to form without the oxygen carrying capacity.= to make them suffocate. If your dog or cat is diagnosed with onion toxicity, blood transfusions can be used until the chemical clears the system.
