Senrty Pro XFC  is not a product that I would recommend to anybody! I was at Petsmart buying my two dogs their food; picked this up because I was out of Frontline Plus. Big mistake!!!  My two boxers are itching like crazy. They are rubbing on everything and scratching constantly. Gave them a bath and then benadryl. Called my vet and she told me to wash them with Dawn and continue the benadryl. Also to call her in the morning and let her known how they are doing.  My older boxer has even vomit a few times. I will never ever buy this product again. I love them to much to ever cause them this much...