they ignore the ev idence of breed mating with breed producing a new breed they can observe right before their very eyes.
But nobody has ignored that.
Nobody denies that crossbreeding can lead to different breeds of the same species. The problem is that you've zoomed in on one very specific,
extremely anomalous case, that doesn't even work when extrapolated backwards. There's a reason people keep on asking you "where did those breeds come from". Because even going back through known human history, these breeds were not made simply by crossbreeding existing animals to get mixed traits! They were bred from random mutations in the wolf population. The Husky and Mastiff came from that stock, through selective breeding.
This is the problem we run into - in your model, the tree of life is upside down, leaving us with an ever-shrinking pool of genetic diversity. And somehow, with this, we're supposed to have an ever-growing pool of morphological diversity? After all, once you have your "dogs", where does the genetic diversity come from for new breeds of dogs to appear? Mutation? But unless you invoke some completely baseless barrier to genetic diversity, this will lead to the evolution of new, distinct species.
And of course, as pointed out numerous times, dog breeds are just about the most extreme outlier in nature. There simply is no known extant or extinct species that can compare to
Canis lupus familiaris when it comes to morphological diversity, and I have explained
why they exhibit such a unique diversity elsewhere on numerous occasions.
All that said, if you still hold your model to be correct, here's a suggestion: go to one of any number of the resources online for asking about biology! There are numerous websites literally titled "ask a biologist" - post your idea there and see what the actual experts have to say about it. Then link it here. Who knows, you may have found some incredibly important development that will completely reform biology. We're talking dozens of peer-reviewed papers, research grants, and entirely new fields of science! Alternatively,
if your track record on cosmology is any indicator, what will happen is that countless people who know almost infinitely more about the subject than you will completely dismantle your hypothesis, and you will refuse to admit any problems with it. Your incessant repetition of the same bogus talking points long after people have pointed out the problems with them seems to indicate this as well.