I order the Advocate XL 6 pack every other month for my great danes. I had one almost die from an oral monthly worm preventative from my local vet. I would highly reccomend this site and its products as I have ordered over 6 times from them and I could not be more satisfied! Advocate is the best and most gentle on you beloved pet! AAAAA++++ http://ad9d709c61d5775c2074-fe44033c041e2e92b0fda6a03f89a69d.r69.cf1.rackcdn.com/148/testimonial/15166.jpg