The first time I bought this necklace there a year I thought I was ripped off buy at 40 euros veto and yes it hurt me, and besides it does not work the raw semaines.La veto m ' avit accused that he had three weeks I thought pipo.Mais not this is true then my dog has not had anything or ticks or fleas and yet it is all the time in the water avec.Je wanted to share my experience While this may help choisir.La only thing is that this time I just order online it's been half price anyway.