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  I am so sorry you have lost  your Pixie.  I had a Pixie once and she was very special to me as well.  We are sometimes surprised by the loss of a person to a disease or heart problem, and they can talk and tell us how they feel. How could you possibly know, the vet didn't even catch it.  I'm sure Pixie had a wonderful life with you and is watching over you now and not wanting you to grieve too much.
 Good thoughts coming your way,
 
				__________________LaVail Yorkshire Terriers
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