I'm enjoying my Cackle birds. They're about 8 weeks old, now. I did get a nice ratio of pullets to cockerels (13 to 6) than i expected from a straight run order. They also may be from better stock than i originally thought...being a newbie, i am no judge of how they would compare to any other source, at this age. There are at least 2 of the pullets that have no black in the beaks, the cockerels, of course, have far less black skin. I don't see foot/toe problems or any skeletal problems. They did come in with a lot of difference in size, maybe that is normal. The pullets that were littler seem to be catching up a little faster than the one little cockerel, but he's holding his own amongst the bigger ones.
The young cockerels have an instinct to protect, and they can act before thinking, especially if any of the flock get upset. We've been working with them, and this seems to help a lot. I suspect that it is hormonal, seeming to come on strong with the 'showing' of comb/wattle. I really think that from an order of 25 cockerels, you could end up with at least one that would fit the standard, nicely. Time will tell about that.