Of course, if a nearby tribe had massacred the colonists, why wouldn't the bodies have been left behind? The lack of any remains strongly suggests that the colonists left on their own.
Religious dietary laws tend to focus on how unclean the animal was when it was alive, ie. whether it "chewed the cud" etc. Lab-grown meat might as well be considered vegetable matter since it's grown under antiseptic conditions. There is something new under the sun, after all.
But did the dog know enough to arrange for health coverage first? Being man's best friend only gets you so far.
Is that covered under the palimony suit?