hi chris bonnie, welcome to pb, hope you enjoy it on here, well firstly you will be very suprised at how far they can fly at 5 weeks old! so try not to leave them to long, are you getting your next lot of pigeons from the same fancier? try and avoid getting ybs from various different sources if you can, the feed you are feeding them is fine, as they need a good diet as they are still growing, but what you must have with ybs is control, so i would make sure they are that bit hungrier than normal when you let them out, as they are less likely to fly off, and from the star you will have control of them when you shake the corn tin, whistle etc, ybs never forget and you will get them that bit tamer, you dont want wild birds or bird that are to tame in my opinion, even though most of mine are as wild as hell!! lol anyway good luck and you will always get the best advise and top people on this fantastic website, its helped me loads over last 4 years, speak soon,