I am very sorry to hear about your Maggie and almost losing Mia at the same time.
There is a sticky that "talks" about dangerous foods/items for dogs
http://www.yorkietalk.com/forums/yor...oods-dogs.html
We too have a bumper crop of big mushrooms the past few weeks. I have to watch Zoey, our foster/almost adopted, very closely on our walks since she is a nibbler and chewer. I firmly believe that it does not take much at all to cause health problems in our furbabies.
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Zack, Zeke, Zoey, Zipp RIP 6/28/12