Shelby just had her second surgery one week ago. Left knee this time. Right knee done Jan. 2014. Shelby is doing much better this time around. I truly believe, that having put her on the GlycanAid HA supplement has helped her to be stronger and healthier. The tear was 20% against 80% last time. That alone tells me she is stronger. We will be leaving her on GlycanAid HA for the future. I could not have done as well myself (76 yrs. old) without the manual that I also copied online. Thank you so much for making things better for all the dogs and people.