Actually the new law says the duration is to be according to the manufacturer's directions. For dogs and cats, that's 3 years. For ferrets, that's 1 year. My vet is going to stick with the manufacturer's recommendations for ferrets; annually. I believe most vets will do this because of liability issues. Newspaper articles tend to hit the highlights without all the details. It's better to look for the text of the actual legislation. <http://election.dos.state.fl.us/laws/05laws/ch_2005-074.pdf> [Posted in FML issue 5113]