I don't quite understand what you mean. Getting the site?
Also, you don't seem to understand what I am attempting to explain. Breeding a tiny breed doe (a pygmy) to a massive breed buck (a boer) is basically begging for kidding problems. If the kid is physically too large, because the kid is half boer, the kid will die unless a veterinarian does an emergency C-section. And the doe will die unless the kid is removed. So unless you want a a huge bill courtesy of your local livestock veterinarian, find another goat. Trust me, they're out there. Especially since you aren't looking for anything purebred.
If you breed a pygmy buck to a boer doe, there will not be issues. You wouldn't breed a female chihuahua with a great dane male, or a pony mare with a percheron stallion. The female is limited by the size of her hips and birth canal.