Put a gob of this mixture on your finger, insert into the gaping mouth of the bird. Get your finger well into the throat, since this simulates the parent's beak and triggers the swallowing reflex. Young crows need to fed in this fashion until 5-6 weeks old. Thereafter, they will begin eating by themselves, almost anything. Work in as much wild food as possible.
Crows begin to fly sufficiently to be released at eight weeks or so.
Caged corvids become demented. They may appear tame and affectionate, but this is only the demeanor of a prisoner. Young birds who were imprinted, hand raised and then released will hang around the premises - being very entertaining throughout the summer, lighting on shoulders, rummaging through pockets, stealing earrings, trying to get in the house, etc. In September they will begin to drift off, hopefully joining and becoming integrated into flocks of wild crows. Also, if you had not spent a lot of time and emotion raising a foundling, it would have been dead within a few hours of being ejected from the nest.