Just thought I'd put my 6 eggs in,,,for what there worth.In 33 yrs of ferreting,I have never owned a knocker box or have I<[bANNED TEXT]> EVER[bANNED TEXT]>had to dig out a fert,so,as Ferretlove(brilliant name)says the bonding and the play that you put in with your fert will pay off tenfold.I call my ferts they come...it's as simple as that.If I have a lay up,I have a purpose built box that I put into one of the holes and block the others,and,put a little tin of milk and some rabbit liver in with the straw,and hey presto next morning,there they are asleep in the straw.I must also add,