Happy dogs wag their tails which means it's a pet owners job to keep dogs protected from fleas, worms and heartworm to ensure tails are wagging all the time!  The good news is when you purchase Sentinel Spectrum between the 29th of August, 2012 to the 16th of December, 2012 you will be in the draw to win weekly happiness packs or daily red balloon prizes! Simply order online at VetShopAustralia.com.au to receive your Sentinel Spectrum and a unique code with your order to be used for entry into the draw. Visit the Novartis Website for full terms and conditions.