Once upon a time, your dog was a pup. Remember that? Running, lunging, scampering about, acting just like my dog did when she was a pup. Of course, that was just before she got diarrhea and joint troubles as she got older. The remedy for me was a probiotic and joint supplement, the only combined one I found on-line. Watch this :

The brand of the supplement is ProbioticPlus, and it has probiotics for dogs and glucosamine, chondroitin and MSM for the joints. Awesome! I like that it is all in one, so that I do not have to be concerned about drug interactions. And it does appear to get results, so check it out and let me know what it does with your doggy!