ever wonder why they're called "milk-bones"? here's why

thanks pixabay (CC0 creative commons). no clue on the backstory

Milk-Bones.  They've been a handy dog-treat staple for seemingly forever, but did you ever ask yourself why they're called "milk" bones instead of "meat" bones?  The answer involves the year 1907, an organic chemist, a great deal of milk (from a slaughterhouse, sadly), and the chemist's discerning dog.  Atlas Obscura has the story here.