If us vets could form a band, it would be a 70’s soul group, and we would groove like this:
So I'd like to know where, you got the notion
Said I'd like to know where, you got the notion
(To rock the boat), don't rock the boat baby
don't tip the boat over
(Rock the boat), don't rock the boat baby
(Rock the boat)
I’d be the guy wiggling on stage right.
Sometimes if a cat is just like you say - amazingly healthy, happy, and active, with a great appetite, but something in their treatment plan can be made theoretically better, we still recommend not to rock the boat. Because theoretically better doesn't always mean the cat will get the benefit.
Now for your kitty, I don’t worry about age when considering most kinds of therapy. And once they show stability on a trial of medication for hyper t4, I'm not worried about worsening CKD as an absolute reason not to do it. So I have had 17 and 18 year old's go through radioiodine therapy with no problems. FYI for those not in the know - it’s an injection you give to a cat to resolve their thyroid issues. The procedure is not painful. They have to stay in the hospital for 3 to 7 days, depending where you go. People worry about CKD getting worse after you treat a cat for thyroid issues but the fact is, uncontrolled thyroid is a bigger menace to the body (and possibly the kidneys too).
But sometimes you don’t want to rock the boat. Sometimes preventative medicine keeps the water calm. Either is OK, at the end of the day you trust your gut on this to make the judgment call.