It would be too late now as the bones will have begun to knit. But it is really important for duckie to exercise the leg. Once the break is no longer painful it may be able to start using the leg again - but it will most likely have a limp and not use the leg well.
You may as well see if you can do something to support the leg so that duckie can try and walk - but just be careful to ensure you arent causing the little one more pain than it may already be in.
You may as well see if you can do something to support the leg so that duckie can try and walk - but just be careful to ensure you arent causing the little one more pain than it may already be in.