your birds won’t be flying well around the house because the cocks will be chasing the hens down , when u split them they should fly better , I would keep them on Gerry plus for the first 2 races and then add a widowhood mix in the further the distance the less Gerry plus and more widowhood mix, you won’t get it right first time but u will find out what u have done wrong , that’s easy its getting it right that’s hard,, I wouldn’t ration them, let them eat what they want, once 3-4 go to the drinker take the food away. JMO