He's now had his femur bolted back together.
This will do no good whatsoever if he puts it under strain, so for now he's got to be confined. Which means locked in a cage, for weeks and weeks.
(3 to 6, anyway)
We're leaving him at the vet's till Monday, when we will collect him and his cage. (Sake will, meanwhile, be also being collected, in her case from the cattery where she'll be for the Novacon weekend.)
And then we'll be keeping him in a cage at home.