I am not sure about Iams as it is IMHO a low quality food , having jt support ( I will look it up).. nutro and royal canin both have jt support in senior
you might need it for a few months( this is dog as cat studies are few and far between)... My Kandies jts greatly improved on just Nutro max cat senior( it doesnt post amounts so read the label...
The vet recommended it about a year ago after I told her about my cat's recent reluctance to jump up. She would get ready to jump to a table or something, and assume the jumping position, but hesitate.
Ever since she has been on the cosequin supplement she is much more youthful in behavior. It's great!
It comes in capsules, which you can sprinkle on the food. I feed dry food, so I put some water in the capsule then sprinkle it on the food so it sticks. If you use wet food, you won't have to wet it first.
I give 2 capsules a day, one each, when I feed in the morning and night.
Sierra enjoys Catswell Happy Hips. It's all natural chicken breast with glucosamine, chondroitin, flaxseed oil, and naturally preserved with vitamin E. I could really see a difference in her soon after she started taking it. http://www.catswell.com/?title=Happy+Hips
I give my cat Cosequin for bladder control... he has chronic cystitis. It has done wonders for my little baby. I have seen a huge change since he has been taking the Cosequin. If it does for joints what it does for the bladder, I would definitely recommend it!