hey guys,cheers for all your replys.After doing a bit of digging I have found a list of birds which are "auto sexing" the list I found is as follows
Welbar
Rhodebar
Wybar bantams
Gold Cambars
Gold legbar
Amrocks
Cream Legbar
Cobar
Barnebar
Bantam Welbar
I think its really useful to know,does anyone have disagreements on this list?We did rule out hatching chickens but now I know the breeds which auto sex it does make things a little bit more do able.The male chicks could be killed and sold as food for keepers of birds of prey I was thinking or something along them lines.