I would repot all 3 plants in separate pots if u have place for more pots.
Usually I prefer repotting in mid winter when my Cephalotus are in their full dormancy...
If you do decide to repot, I suggest you leave 'freak' close by and maybe teach it to sing Montell Jordan's 'This is how we do it' ? (Sorry I'm waiting for the England v Wales kick off while drinking copious amounts of homebrew)
Some people who are used to "ordinary" plants are obsessed with feeding CP's.
Just don't bother, they will grow perfectly well if they are allowed to feed naturally.