Anything from a day to never, some take quickly others just might not take at all, have a brick or block so the hen can get out of the cocks way, some cocks can be lethal
military aircraft have orange life rafts, they trained the birds to orange, when they pecked in the right direction it released a seed, that was when training the birds, the search crew had a referance of a few square miles for pick up but the birds were far superior in spotting
Was reading in a birdie mag. dec.09, Research published in the journal, Nature, has found that birds use their eyes to detect the Earths magnetic field for orientation
Went to bed last night with 3 to 4 in. of snow everywhere, rained in the night got up and all gone, at last, got 6 dogs so agree with abbeypap, a lot of clearing up, oh happy days ;D