Millie's the only one I bathe. And I loathe doing it, only because she screams bloody murder! I have a large sink near my washing machine -- it's square and deep (it's like a laundry tub but it's really a sink) so I hook up one of those hand-held sprays and it works well. Millie is a large cat (putting it mildly hee hee) so she has trouble reaching her delicate areas, so she's the only one I need to bathe.

On a side note, Cleo is a self-bathing freak. All day long !!