Chooks can be pretty dumb for smart critters, my guess is that the SLW has bruised a drumstick
and the empty crop should be fed with something hard to resist like a mash of warm bran or the like. Even a rice and sardine will get them feeding. Recovery from injury rests on being able to use existing body resources, if its not feeding my thoughts go to getting that process working first and not to treating " could be " stuff,
Cheers,
Andrew

Cheers,
Andrew