Attention Veterinarians!!?

Two of my dogs were playing with an onion. I don't really think they ate it, but there were little pieces of it in the yard. I read somewhere on the internet that it's toxic to dogs. Is it?
Answers:
Yes it is. If they are large dogs and didn't have very much then there's not much to worry about. The smaller the dog though, the more cautious you should be. When did they "play with it"? Call your local vet to determine whether it was recent enough to induce vomitting, if that is necessary. Vomitting can be induced by serving a tea spoon of peroxide.

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i am sorry to say this but yes

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Onions are toxic to dogs. They can cause a type of anemia. They probably just played with it. I have yet to see a dog actually eat an onion or even bits of one unless it is hidden in something else they are eating..not a fave flavor for these guys, but best to keep the things away from your dogs if possible.

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Onion and garlic poisoning
Onions and garlic are other dangerous food ingredients that cause sickness in dogs, cats and also livestock. Onions and garlic contain the toxic ingredient thiosulphate. Onions are more of a danger.
Pets affected by onion toxicity will develop haemolytic anaemia, where the pet鈥檚 red blood cells burst while circulating in its body.
At first, pets affected by onion poisoning show gastroenteritis with vomiting and diarrhoea. They will show no interest in food and will be dull and weak. The red pigment from the burst blood cells appears in an affected animal鈥檚 urine and it becomes breathless. The breathlessness occurs because the red blood cells that carry oxygen through the body are reduced in number.
The poisoning occurs a few days after the pet has eaten the onion. All forms of onion can be a problem including dehydrated onions, raw onions, cooked onions and table scraps containing cooked onions and/or garlic. Left over pizza, Chinese dishes and commercial baby food containing onion, sometimes fed as a supplement to young pets, can cause illness.
Onion poisoning can occur with a single ingestion of large quantities or with repeated meals containing small amounts of onion. A single meal of 600 to 800 grams of raw onion can be dangerous whereas a ten-kilogram dog, fed 150 grams of onion for several days, is also likely to develop anaemia. The condition improves once the dog is prevented from eating any further onion
While garlic also contains the toxic ingredient thiosulphate, it seems that garlic is less toxic and large amounts would need to be eaten to cause illness