CatanDogÆs prevents and eliminates fleas and ticks. It is effective in dogs and cats of any age, weight, size type, including sick, convalescent and pregnant dogs and cats. Completely safe with no side effects How it works: CatanDog's plate produces (or) generates electromagnetic and scale waves, without incorporating any battery, as it's not neccessary, the POWER supply is the "earthly magnetic field" and the amimal motion in it, cutting in such a way the flow lines ,and, thanks to "Lenz Law" producing "Foucault" currents of extremely small power but enough to activate the CatanDog's disc, that acts as a passive resonatorà