Okay, hate to do this to you, but found a link at Huff-po. I know just the link is covered in yuck, but here it is...
http://www.huffingtonpost.com/2011/01/15/dawn-sylvia-stasiewicz-dead-bo-obama_n_809551.html
That is the first time I have ever darkened their site! Ick! That is not where I originally read about this, though.
Sorry...I refuse to go to the link...there are other sources.
http://www.deseretnews.com/article/700100990/Woman-who-trained-Obama-family-dog-Bo-dies.html
She was young. 52 y/o. Too bad.