Dog ate tuna sandwich with onion and garlic. Will he be okay?

Question

My dog got hold of a small amount of tuna sandwich that had a small amount of onions and certainly had some garlic, too. Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 40 lbs

Sara Farmer, DVM · Accepted Answer

Dixie will probably be just fine. It takes quite a bit of onion and garlic to cause clinical signs of toxicity - for a 40 lb dog the toxic dose would be 20 grams of onion or 5 grams of garlic. Both onion and garlic cause destruction of red blood cells leading to anemia. Onion and garlic powder can be more concentrated than the raw vegetables and therefore more likely to cause a problem, but I doubt there would be enough of either in a tuna sandwich. We also tend to see more problems when small amounts are given frequently rather than a single one time exposure.

Dog ate tuna sandwich with onion and garlic. Will he be okay?

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