"All we ever wanted was to give Jaxon the happiest, most comfortable, and most fulfilling life possible, because we know how precious his days are with us," Brandon Buell wrote in a Saturday Facebook post. "Every doctor we've talked to is fascinated that Jaxon is here today, and they can no longer predict a prognosis, although we know the reality behind this better than anyone else, what Jaxon is up against, and that his life is already miraculous at this point."