There is a phrase used in vetting horses in England,,,"Suitability for use intended".That phrase is helpful in finding top specimens in all livestock across the board.Let's go to the dog world for an example of what YHF was discussing about imagery. From 1994 thru 2002, I spent 1,000's of hours researching and studying the lit of the rough and smooth collie breed. I was a lit nerd, smile. Still my knowledge seemed 2 dimensional. Something was missing. Then in 2002, I took a trip to Calif. and spent 2 days in the presence of a smooth collie female who was the top winning collie of her generation.. 30 BIS All Breeds. I got to go over her and her breeder explained her. Then I understood. It wasn't until I fused the theory and lit with the living thing that it all made sense.
Get your breed. Get the best you can find (that's why this is thread here) so you train your eye on excellence, not faults. Then hold them, compare them using judging by virtue ,not faults. If you judge by faults you become a critic. If you judge by virtue, you become an admirer of excellence. Tune your mind's eye to the excellence that makes a fine breeder of poultry. In other words, " I am keeping this bird because it has more of what I want, not less of what I don't. ". Seek to admire balance and symmetry in your breed. It is very closely aligned with the breeds utility purposes.
Seek out veteran breeders in your breed. Either online or at shows and have them explain the nuances of the breed which are critical to selecting for proper breed type. There is a book out by a legendary dog judge ,Mr. Carmen Battaglia. It's called "Solving the Mysteries of Breed Type". Tho a dog book, its knowledge resounds across species. Including subjects like proper mind set and the importance of getting and understanding the nuances of a breed with which you are working. In the end, one of Judge Battaglia's beliefs is that without understanding the nuances of a breed, it is very difficult, or impossible, to select for proper breed type. Where do we get this information? From studying the history and origins of the breed ( how we got from there to here so we understand how to proceed into tomorrow)..and by talking with those who already have this knowledge. At shows is best because (hopefully) there will be superior specimens there for them to use to show virtue, not just faults. Like YHF said, it is a multiple pronged approach, which slowly starts to weave itself together into a unified field of knowledge which results in wisdom (i.e. , knowledge + experience) to make one's own determinations in their breeding program.
Best,
Karen
In my breed, I ask if a bird will be a good layer, with the running gear to forage, and will it mature into a good roasting bird as well. No good having one, without the other, as Orps are a dual purpose breed.