Happy May! It's that time of year, when we'll be spending more and more time outdoors and I would love for my indoor kitty to be able to join us, at least on the deck (if not in one of those Cat Fun Runs Alpha1 mentioned in a previous thread!). He caught fleas there once before, so I want to take some preventative measures to ensure that doesn't happen this year. What can I do? Natural is best, but I would like to know what has worked best for others.