Or pressure cook itIf she's mostly been free fed and not had to forage too much, she's probably still pretty tender. CX are naturally lazy birds usually.
I've processed broilers at that age and only noticed a difference in taste with the cockerels.
There isn't really such a thing as "too late" to process a bird for meat unless it's actually been dead too long for the meat to be safe, or dying of something that makes it a bad idea to eat it. At worst, you might have to cook it low & slow to avoid the meat being too tough.