Okay, so the dog talked to the turkey in a scornfully derisive or mocking way.
How did that ruin Christmas?
Perhaps the writer meant to use the term “scarfing” in its slang form?
It’s a story from a British paper. They say “scoff”. “Scarf” is a much more recent variation of that word.
I went to a British forum, and found the following:
“Scoff” is a verb meaning “eat”. It carries a connotation of being somehow “cheeky”, as if you are eating something you are not entitled to.
Scoff is a UK military slang term for food rations as in, ‘Have you eaten your scoff yet?’
Furthermore I’m sure I’ve heard ‘scoff’ being used as a synonym for lunch (or a sandwich, or similar) in the north of England, almost certainly by men who might be described as working class. This recollection goes back a while.
http://boards.straightdope.com/sdmb/showthread.php?t=545329