A fabulous thread so far, some great advice.
I have a copy of the Chant pages from the APA Standards of Perfection but have zero experience using it.
As was mentioned, what are your goals, this time regarding the SOP? I breed mutts for my own purposes so there is no third party SOP for me. If you show them or sell hatching eggs or chicks then following SOP with the rooster and the hens is important. Some people like to follow the breed SOP as a challenge or just because they like it.
- I know character & personality (c&p) are important IF I KEPT A ROOSTER WITH MY HENS, I DO NOT. [I keep all cockerels & roos in a separate cage, also have a cage I used for controlled breeding.] Does this negate c&p as criteria for selection?
You said you do for a month when breeding. Of course that may change because of this thread. As always this is up to you. For me, I will not keep a human aggressive rooster. I remove hens for behaviors also. I keep then differently than you do. If you do not consider c&p as important you do not have to consider it.
- I am certain that folks on BYC have their own considerations regarding what make a good BREEDING SIRE, I would appreciate anything that anyone cares to contribute
It is hard to add to what others have said, some great responses. The general way to improve your flock is to select hens based on what you can see about the hens and select the roosters on what you can see about your roosters. Ignoring sex linked genes (you have to ignore them for this discussion) both males and females contribute genetics toward those traits, but since roosters don't lay eggs you can't tell a rooster's contributions to egg genetics by direct observation. There are things you can't tell about a rooster by observing the hens that lay the eggs.
If you know his mother's and hopefully grandmothers' egg laying characteristics then you have a pretty good idea what he may be contributing. As an example, one of my goals is for blue or green eggs. I only keep roosters that hatch out of a blue or green egg if I keep one of my own. Occasionally I import one for genetic diversity reasons as you did. Keeping a rooster that hatched out of a blue or green egg does not guarantee that he will contribute that gene to his offspring but it certainly increases your odds.
I understand your question is only about the sire but if you are trying to improve your flock I'd consider both sides of the equation. You probably don't have much information about the individual mothers of these cockerels this round but maybe something to track and consider for the next time.
I very much agree with the concept of eliminating the ones you know will not make the grade early so you can better examine the ones that have a chance. That should get a little harder each round but what that means is that any of your last few could be a good choice.
Good luck with it. Those last few can be really hard.