Fellow rescuers, need advice please : we have an extremely serious problem with fleas and ticks. The place is sprayed on a regular basis and the adult dogs are tick free, the problem is with the puppies- they don't react well to the tick spray (start vomiting etc), so they are not sprayed as often as the adults.. so they are full of ticks :( Has anyone tried a spray that won't harm the puppies? our other solution is frontline every puppy but it will cost a lot, can anyone suggest a cheaper and safer solution please???