Hi !
You are mixing Cattery (which is a kind of online storage for boxes & live cats) and the Menagerie where
are sent retired kitties.
Don't worry too much about the fact your cats are not the latest version, they are to no means outdated
(if they were, they'd have a red hovering text and you couldn't interact with them anymore).
If you really want them to be at the latest version, then you can send them to the Cattery and back inworld
it only takes 2 minutes, but you prior have to be registered on the KittyCatS website (which obviously you are,
otherwise you couldn't chat on this forum) and need a cattery dock you can get for free at the mainstore.
Hikari