I have purchased Flex Sprinkles for the past 8 years, after my Giant Schnauzer had his Achilles operated on and used to limp. I noticed a massive difference within a month and for such a heavy dog, it is amazing how he still bounces about for an 11 1/2 years old. On occasions when I do not give it to him, I can tell a difference within a few days. I also give it to my other two Giants; one is 9 years old and the other 22 months.
