Hartz Hartz - Ultra Guard One Spot Drops, 1 Each, $6.50Kills Flea Eggs Before They Hatch. Prevents Flea Population Build-up for 30 DaysHartz Hartz - Ultra Guard One Spot Drops is added to Favorites, uncheck to remove it.Add Hartz - Ultra Guard One Spot Drops to Favorites.Hartz Hartz - Ultra Guard One Spot Drops, 1 EachOpen product description$6.50 was $12.99Add to Cart