While trying to develop a chicken that looks like a crow is interesting one thought stuck out.  Why people keep chickens.  Usually eggs /and or meat is the answer.  For me, it is eggs and tick control.
    The size of the birds being bred seems smaller than a meat bird, and from what I know none of the parent breeds are good egg layers.
    My thought would be in addition to looking like a crow the chicken should be a half decent egg layer.
       We have hawks in abundance but thanks to lots of cover and hiding places and dogs that are very protective of the chickens, hawks aren't a big deal. 
     They also leave the bigger birds alone.