I’ve had my Boxer on Flexi9 Joint Plus for a month now and delighted to see noticeable improvement in flexibility and strength in her hind legs. Having had 2 x TPLO surgeries and associated arthritis she’s been on Flexi9 for 2years but I do recommend this stronger formula of Flexi9 plus for dogs with joint issues. My other Boxer remains on the regular one for maintenance. Both happy with it and no problem mixing into food.