Poinsettia Problem

One wintery Christmas day little Billy was having a feast with his family.  They were all enjoying the Christmas festivities when Billy's mother abruptly jumped up from the table screaming "NO, DON'T EAT THAT!" While Billy knew that his grandmothers fruit cake was not that appatizing, his mother was being a bit rude.  At that moment Billy followed his mother's gaze and saw that the family cat, Roy, was eating the poinsettia.  The whole table errupted at that point worried that Roy would drop dead at any moment, for poinsettia's are said to be highly toxic especially to cats.  

So what do you think happened to Roy?  Back your ideas up with facts about this most dangerous Christmas Vegetation.  Here is video that gives some information about how these plants are grown.

http://www.5min.com/Video/How-to-Grow-Poinsettias-77765050