Yip . Had this last year with a yearling cock . After doing all the usual stuff ( testing droppings looking for injuries) On a day when I was off put the six of my eight W/H cocks out keeping two yearling cocks in . One being the bassa that wouldn't fly . After getting the other cocks in . Put the bassa yearling and the other cock in a basket and put the basket on the garden table. Let the yearling bassa,s hen out and the other cock . After thirty minutes of flying and treading. Let the big blue cock out he chased the two of them all over the sky and never looked back after that .