i have three different age groups .. none laying age yet .. but the youngest are .. four weeks old .. and the oldest are 18-19 weeks old ... the middle group are three months .. i wanna put the youngens out with the three month olds .. and seperate the almost laying age ones... how old do the youngest need to be before i put the on the grower ? ? i know the oldest are ready for the layer now .. but am waitin till i can seperate them ..