there is one company that i know of within the united states that sells a pharmaceutical grade supplements for dogs AND cats.  The supplements are made in a full-licensed FDA facility AND are also made in the State of California which is ever more stringent in terms of regulation.  The supplements are made by a company called Integrated Pet Solutions, in Los Angeles.  I've checked around and they seem to be the only company making to human-grade standards.  Actually, their supplements are better than a lot of the stuff that is out there for humans.  Website is located at www.IntegratedPets.com, or www.seniorpetproducts.com.  Hope this info helps.

Diagnosing pet illnessness is not for the uninitiated.  Many compounds made for people are toxic in animals.  If you don't love your animals enough to take them to someone trained to care for them, you shouldn't own them.  Animals re not statements of personal belief--they are living creatures that have put their full faith in you, the owner, to do whatever it takes to keep them healthy and pain free.