I really haven't seen my dog "angry" in the two years I've had her, until last night that is. We live on a dead end with woods surrounding us on three sides. Wildlife is common in our yard and on the property. Sadie gets excited when she sees a deer, raccoon, an ocassional bear, but nothing like last night. It was about 11:00pm and she was sleeping in her bed on the floor. I had the door open facing the woods. All of a sudden, Sadie bolts for the door and starts growling, barking and jumping on the screen and just being spastic. I turn on the outside lights and see what I think is another dog walking with a person into the field in front of our house. Can't quite make it out and the dog and man disappear into the woods. I didn't get too excited because there used to be a trail that ran in that area and there it still gets some use and ocassionally during daylight hours, someone will still walk through. I'm a retired Sheriff's Deputy, so not much gets me excited. Also, we live in an area with very little crime, so no suspicion there either. I had to forcefully restrain Sadie for a couple of minutes and after that she still sat at the door and growled under her breath for a while and then went back to sleep. My wife always wondered what kind of watch dog Sadie would be, guess that answered that question. We have been in all kind of situations with Sadie in the 2 plus years we've had her and I've never seen her act like this. Just got to wonder what she would have done if I had opened the door and let her go. Would she be all bark and no bite? Anyone with similar stories?
Our first GSP was protective of us. Held the telephone man in a sitting position for 2 hours after he jumped the chain link fence to get to the box. He said as long as he did not move she was fine.
Another time a friend came up for help from her abusive husband. He came right up after her. My husband was on a business trip. When he opened the screen door all you could see was teeth and snarl. He left.
P.S. In 38 years of owning GSPs I have never had one bite anyone.