The Gray Muzzle product line from Ark Naturals is designed to address the health concerns of senior dogs, like joint discomfort, heart function and canine cognitive dysfunction. Made in the US in USDA-APHIS approved facilities, Gray Muzzle products are free of wheat, corn, yeast, soy, artificial colors, flavors and preservatives. The product line includes: Old Dogs! Happy Joints! bite-size soft chews with glucosamine HCL, fish oil and turmeric for improved mobility and flexibility; Heart Health! Wags Plenty! soft chews for improved heart health with taurine, L-carnitine and egg albumin; and Brain's Best Friend! soft chews with fish oil, vitamin E, resveratrol and pyridoxine for improved cognitive function.