Thanks so much for the heads up! Like I said, we know about green potatoes, chocolate, and we have a plant toxicity list, but I did not know about onions! It certainly was not a regualr part of our dogs' diet, just an occasional bit. Now though, there will be NO ONION in their diets! Here is a site I found with more info:
http://www.jlhweb.net/BOSS/onions.html