I've just come across this website that is giving away a free 400gm tub of canine food supplements, I think they do UK, USA, quite a few places. They're so convinced you'll like the product that they give you a free 400gm tub worth £12. Im going to be trying it soon.
http://www.fitnfertile.com/free_tub.asp
http://www.fitnfertile.com/free_tub.asp
http://www.fitnfertile.com/free_tub.asp
http://www.fitnfertile.com/free_tub.asp