I have a hen who I'm keen to breed, she's just finishing her moult now, she still has a few pin feathers but they are not blood filled any more just not preened open yet. She's in great nick otherwise, plenty of meat on her (actually a little tubby methinks ) and very perky. How long should I wait before putting her down?

I'd give her a couple of weeks on Calcivet and then give her a go.