Will Falconer, DVM Moderator
Hey Cheryl, I like where you're heading, but Lepto: no way. Just google that word and "problems in dogs" and you'll see why in short order.
My drug free heartworm protocol is the only one I know that makes those on it healthier the longer they are on it. No drug "preventative" can come even close to that claim! They are all neurotoxins, by the way, also associated with more risk than benefit.
You're doing somethings right to have a frisky 13 year old like this! Take it another couple of steps and let us know the differences you see!