I'm familiar with that Hemingway story. I've been plowing through the complete short stories and it's taken me a while to do it, but I do recall reading that one some time back. The London story isn't in the volume that I'm reading now, but I'll see if the library has it. Yes, he had a good handle on dogs.
I know there's a multitude of London books available but one of the best compilations (about 25) of his short stories I've seen is "To Build a Fire" - and other stories", published by TOR. Regards,