Continuing on the Cartrophen discussion - I first started giving it to cats almost 15 years ago. It's off label for cats, that just means no formal studies done but informally lots done. I managed to convince my vet to fill the Cartrophen in an insulin syringe that I could take home and give myself. That mean no extra trip for kitties (Neko and her buddy) and insulin syringe had a much smaller needle than the huge needles they first gave me. The economics of Cartrophen (once opened, bottle has short shelf life) means it's not worth buying a vial to take home, unless you have a ton of heavy animals on it.
Keep eating Eddie, please.