Chooks4Life, I used some expressive statements. I did not intend for the to be specific towards you. If I got carried away, I apologize. For the most part, the statements were general. What I see a lot of, is for us to get caught up into a lot of interesting and fanciful ideas. There is noting wrong with that, of course, but we often lose our way. I am commenting on the process of learning to breed poultry. The internet is full of it. There is a lot of good information, a lot of bad information, and a lot of distracting speculation. I guess that is where I was coming from, and not intending to direct it at your contribution specifically.
I actually enjoyed the exchange itself. You are obviously intelligent, and probably brighter than myself. I am just trying to learn how to bred a few good birds. A silly hobby that has my interest.
I appreciate the gesture, but there's no need for apology. I'm the first to admit I'm still very much a learner, you probably have a lot more experience than I do. But experience isn't a linear thing, two people can take two different roads without converging for a fair while, doesn't necessarily make their experiences incorrect nor mutually exclusive, as what applies to one doesn't apply to all. That's where agreeing to disagree comes into it.
It seems to me that in any field of knowledge everyone's got pieces of the puzzle, not all of it. It's always good to have a decent, honest debate. Thanks for making helpful contributions, and also for clarifying that your comments were not directed at anyone here.
Best wishes.
Now for that statement has been repeated several times- exactly HOW is the art of poultry breeding different than the art of mammal breeding?
We share the view that it's got more similarities than differences, that does appear to be accepted by the scientific community for what that's worth, but explaining those differences is still something science itself is struggling with.
Seems every time I find something stated as absolute fact from an authoritative source I find another authoritative source claiming the direct opposite... But that's always been my experience in all educational pursuits, nobody knows it all and not a single expert is right 100% of the time, they just tend to agree on some grey areas in-between. Makes for a lot of confusion among the non-experts like myself.

I suspect some areas of life sciences have such high variation that multiple experts can be right despite stating mutually exclusive 'facts'. What's true for one flock isn't necessarily true for the next.
Here's an article which may or may not be relevant to the topic, I'm just sharing because it has some findings which challenge some of the information I'm reading on other sites regarding poultry genetics and breeding:
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Here's a quote from the article, below, nothing controversial here at least... The site also has other articles comparing chickens and mammals, more so than explaining differences, seems more similarities are found than differences explained so far.
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This link below has far more information than the average breeder will ever need but addresses inbreeding in commercial poultry breeds specifically as well as loss of genetic diversity.
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This little quote may have some relevance to your question:
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But that's a pay-per-view so to speak I'm not paying almost $50 for the whole article, sorry.
Best wishes.