"... dead chickens turning up in Puerto Rico?"
First I've heard of this. If it's real it will surface quick on the net. I would expect to find dead migratory wildfowl in droves before any chickens.
Thanks for the response. I'm thinking my M-I-L may have heard wrong or misunderstood the story. If true, this would have been in the news by now. I'll continue to keep an eye out for any sick bird/dead duck stories coming out of the Caribbean.