I decided to start supplementing this season because my dogs are getting old. 10 years + I started the glucosamine a few weeks earlier, and the energy bars the week before our hunt. I believe my dogs hunted an extra day with good vitality specifically because of the C9 products. No bs. Usually by day 4 there are serious and irreversible signs of fatigue, and they tank by day 5. They hunted hard until day 5, and tanked at day 6. That's a 20% increase. And the recovery time after the weeks hunt was shortened as well. I will continue with these product during hunting season.
I use this for my 9 y/o GSP who was starting to act awfully stiff and whiny after her normal exercise routine. She's a pretty hard charger and folks don't believe she's 9 because of her energy. I started her on this and her whining & stiffness has ceased. She is a bit picky and won't take it without peanut butter, I attribute this to the dog, not the vitamin because my 6 y/o gobbles them up if the 9 y/o drops it.
Our 12-year old Lab was starting to show some stiffness in her rear hips after exercise. We put her on this medicine and within a week she was showing no signs of stiffness. She even came as close to running as a 12 year old Lab comes (somewhere between a trot and a canter).