Not even close. Camels and Llamas have been successfully interbred. This shoots down your theory in one big hurry.
Related species share common DNA. The closer the relationship, the more common DNA. All life on the planet is related both phylogenetically and immediately through the agency of viral transduction. For bacteria you can add plasmid exchange.
When are you going to comprehend the meaning of this ability to produce novel combinations of genes in generation after generation for ages and ages? Your hypothetical Intelligent Designer would be hard pressed to get a word in edgewise.
"Not even close. Camels and Llamas have been successfully interbred. This shoots down your theory in one big hurry."
On the contrary, at best that demonstrates a rapid speciation event, precisely what Intelligent Design predicts.
Cross-breeding is a poor digression for this debate, by the way. By definition, the very first species of life had no other species to cross-breed with, so the second species had to either self-form (Evolution) or be created (Intelligent Design). No cross-breeding was possible at that time, so when trying to discern how those first and second species were formed, it makes no scientific sense to pursue lines of thought that can not by definition apply (e.g. cross-breeding).