I want to give my dogs a dog food that has the gluclosamine and chond. in it. My Giant schnauzer has had 2 knee surgeries for torn ACL. They are all on Solid Gold MMillennia but it doesn't have that in it. I am a little worried about switching My pitbull to Canidae also because of his allergies. Would the Platnium be ok for my dogs? They are 3-5 years old(thats their age ranges) it only has 18% protien though. SHould I just find a good supplement?