
That's my Holly (I call her Holzers a lot, so if you see that in various places, it's still referring to her). Her adoption papers say "Australian Shepherd". To me and 2 others she looks like an odd mix of Border Collie and Lab (Borador). To several others they see her as full on Border Collie. It's so much easlier to say "Border collie" than it is to say "well, Brittany Spaniel, Lab, border Collie, and whatever other highly intelligent dogs you want to lump in there".
Anyway, I've noticed that while she isn't "stranger" aggressive, nor is she "strange dog" aggressive, or food aggressive--she's very docile, as you will find if you approach her and pet her and start playing with her.
The only thing is--while at the vet one day, the vet had her hand down near Holzers' 'parts' ready to take her temperature. Holly didn't like this at all, and quickly turned to face the lady, and snapped at her.
Now you guys know as well as I do that if a Border Collie wants to sink her teeth into someone's tissues and organs--they can and will. A snap is just a warning or a message to ther person "Hey, i don't like your hand near my tail, my booty, or anything else down there--back off, or next time I won't miss!"
As a result, they made me put a muzzle on her--and Holly was SO upset that she'd even snapped. She was just looking so sad about it--and she seemed completely embarassed that she had to be muzzled.
Yesterday at the dog wash (self serve) one of the co-owners came up and began to pet Holly--Holly enjoyed it of course. Until the woman put her hand (for one reason or another) near Holzers' tail area. Holly turned and growled toward her--but then immediately showed signs of remorse for even doing that. She tried to 'make friends' with the woman again.
So for whatever reason she's so upset about that area, she's even more self-correcting toward that kind of behaviour. You can tell that that kind of thing stays with her a bit, emotionally, and she ends up feeling bad for a good 10 minutes.
I mean, personally, I wouldn't go around sticking my hand down around a strange dog's tail and area anyway (What was going through that woman's head?).
But why do you think the reason is for all of that? Bad experience in the past with someone doing something to her tail?
She's been spayed a very long time ago. Like I said, she's adopted, so I know very little about her or about her past.

