i wait till the last flight is fully grown, then,[ as my birds cant get out,] i feed them for about 4 weeks on the best malted barley, they only get enough to eat, as to when they start picking,i keep a close look, and handle the hens to make sure they will not be fat in any way, fortnight b4 pairing ,i feed mixture, mixed with wheat germ oil, then feed accordingly after that
p.s i often mix a little wheat germ in the barley and add brewers yeast, they get garlic in the water, everyday.remember, these birds have previously been fed on a high protein diet ,to ensure a good moult and at this stage are a wee bit on the fat side vits once a week.. had their dropings tested , all ok.