I asked in another discussion if dogs can catch Swine Flu and it made me want to research it more myself. The information I've found is not all consistent, but here are two links that provide some good information on the topic:
http://www.aspca.org/blog/can-cats-and-dogs-catch-swine.html
http://www.waycooldogs.com/swine-flu-can-dogs-catch-it/
One source said all cold and flu viruses can be passed from human to dog. I was not aware of this. If H1N1 is a mutation of animal flu and human flu then why would dogs be safe from it? There have been no reported cases of canines with Swine Flu but it doesn't seem to rule out the possibility.