I personally do not like
ANY of those products. They are harmful to the system and have caused many dogs and cats to die, especially bio spot. It even says on the package not to touch the liquid and if you do to wash your hands immediatly. But, this is being put onto your dogs skin and absorbed into their bodies? I like to take the natural approach, especially after reading posts of people's dogs being poisoned, very sad. There are many things that you can do, and it may take more time and effort, but to me it is worth the life of my dogs. So, for this one I would say no, please do not get the bio spot and maybe think twice about the frontline also. If you do not have a flea problem and keep up with it, it should be fairly easy to maintain without the use of harsh chemicals.