First of all, what a wonderful Momma you are
...driving through a storm bc you knew your kiddo needed help.
I'd be just as scared as you are/were, bc breathing issues are so frightening! I'm *so* happy to hear that his heart sounds good bc that was my first worry - so that's really, really good news.
I'm kind of wondering if he has asthma or something similar, or, something going on with the structures of the respiratory system (somewhere along the way). With some health issues, suddenly breathing really cold air can cause a big reaction if something is already amiss in the system. So it kind of makes me wonder if cold air was the trigger. Also, how deep was the snow? If he was out there alone, could he have gotten trapped under the snow somewhere, and started suffocating a little or breathing in the snow?
Please keep us updated on this little guy and I sure hope he feels better very soon!