We have purchased other products to help for aging joints that have worked, but took much longer to work and were much more expensive. At 13 years old it’s nice to see Nellie more active and have a “spring” in her step again. I simply give her this with her food (she loves the flavor) and it literally costs $1/day to supplement. Thank you for making such a wonderful, cost effective product to give back my “old girl” some of her once young self!!!