100% pro-life (NO EXCEPTIONS!!), and I'd probably write someone in this year if this issue weren't so important to me.
If you could save either a tray of 1,000 fertilized human embryos or a baby from a burning building, which would you choose? Keep in mind that you just said NO EXCEPTIONS.
Even if ExtremeRepublican didn't bite the bullet and gave the answer you treated as the obvious default, this is an awful metaphor that means nothing. Most people would save a human over a dog but that's not a defense of killing dogs.
The difference, of course, is that pro-lifers argue that fetuses are people and should have all of the exact same rights as a person. If someone were making that case about dogs, then choosing between a human and a dog should logically be a choice between equals. It's a completely valid thought experiment, though in this case all it proved was that ExtremeRepublican is ideologically consistent in his wacko beliefs.