She had her den under a machine shed. On an active farm yard.
(https://live.staticflickr.com/65535/52209704205_40e3d24bee_c.jpg)
For no bigger than they are. Reds have very large canine fangs. I've measured a few, 3/4" long at the gum line. I do not know of any tougher canine lb for lb than a Red. Ferocious fighters & near fast as a cat in their reflexes. I've seen many fight some sighthounds & they are a blur of slashing teeth.
Sneaky too.