Went to look at husky puppy tonight,
owner had a full grown adult on a run that went into his front yard and to the foot of his steps.
I reached out to let the dog sniff my hand - a mistake on my part - and the dog lunged at me. ended up in the e.r. with stitches in multiple places - both hands bandaged and a foul mood to go along with it. Dog wasn't showing any signs of aggression other than barking when we pulled in. He just had a determined stare when I reached out.
There's your sign.