Strapper as you say it's breed and wean,I am using it now for my darkness y/b while they are moulting.I also use it for my sprint pigeons on return from racing to replace worn muscle,I mix it at the rate of 1/3 b/wean 1/3 diet 1/3 wid mix fed sat/sun.Mon/Tues I feed 50/50 diet/wid. Wed. onwards 100% wid/mix.I've been doing this a few years now and the birds are flying well on it.When I fed breakdown mix I couldn't get them to fly much early in the week but on the above mix they fly well from the sunday morning and through the week.atb.