Lily has already had Lyme Disease once.  And since Massachusetts is a high risk state for Lyme Disease, you can bet your sweet bippy we were concerned about Lily spending all day outside hunting through the brush for chipmunks and mice (she still hasn’t gotten the hang of rabbits).   I lost faith in topical chemicals after Lily got Lyme Disease.  After all, what good is a chemical that you put on your dog every month that doesn’t deter ticks, and doesn’t kill them until they’ve been attached for 24 hours?  Lyme Disease can be transmitted starting 18-24 hours after a tick bites.  So there’s a window of opportunity there, or a chance for the ticks to drop off and make their way to one of…