WE normally just kill and skin the excess males after about 25 weeks (ours are crosses bewteen Maran and either RIR or t Ssx), take off the legs and the breast meat (there is usually not much of it), then marinate the meat for at least 24 hours in fridge using either a bottle of the cheapest Bulgarian Red that I can find or put it into Tikka marinade (homemade). The red wine marinated one is cooked v slowly like Coq au vin. Both produce great results, nice gamey meat falling off the bone. I wouldn't roast these birds though, we rear meat chicks for that and they are fed on grower pellets and killed after 12 weeks but before 16, or they grow too big for my liking.