Let me see if I can give a little better picture of Klause. When we got him from the shelter - not a rescue, he had no manners. He didn't know his name. We brought him home and he totally ignored us for the most part. Just with time and continued work he knows his name, he knows the commands sit and down, still working on stay - that is hit and miss. He will come when called in the house, or in the backyard. He is better at walking on a leash than he was when we first got him. He also had this annoying little "nipping" thing he would do when we first got him. He would do it to both my daughter and I. He would just nip our arms or hands. We would tell him no, and we just kept saying no sharply and he finally stopped. When we got him he didn't want to have anything to do with being in the backyard, now he loves it. He was also underweight, which he is not as thin now, when we got him you could see his ribs, but now you can't. I would like to see him put on a little more weight, but you can no longer see his ribs, so I think we are good. He is not food motivated at all, and has no food aggression. That was one of the first things I checked as I have a 2 year old grandson. I would imagine he was fed people food and not dog food because he goes nuts over fast food - which we have very rarely. The first time we came home with some and my daughter had chicken nuggets he climbed in the chair she was sitting in on top of her. As far as people are concerned, anyone who has been in or around our home since we got him he is fine with. My oldest daughter and her boyfriend and my grandson he has no issues at all with. My grandson is 2, and he has learned that he has to be gentle with him. We have 2 cats, and that is still a work in progress. He is slowly calming down with the cats. The one cat who is younger will sit on my lap with him around sometimes, but so far every time lately I've let him near her when she's with me he will sniff her, and then try to pull her fur out with his teeth, so I immediately stop him and then she will normally want to get away. My older cat wants nothing to do with him so I don't make her be around him. One time when we had a thunderstorm she was running to hide and he got between her and where she was trying to go. When I got in the kitchen she was on her back and she's gotten him with her claw by the nose and he wasn't stopping so I got him by the collar and she took off. She wasn't hurt, but the fact that he had gotten scratched and was bleeding didn't seem to phase him at all, and that right there bothers me. So he will never be left alone with either cat ever. As far as visitors, he's been fine with any female friends that have come over. My daughter who lives here with me is 20, so she has had a few of her friends over, and other than just making himself a nuisance he's been fine. Any time we've had anyone here doing work he is either outside where they aren't, or in his kennel. We started with a kennel from day one, and he is in there any time we aren't home. I've had him to the vet once, and that didn't go well, he wanted to bark and pull really hard on his leash whenever another dog was around. The vet was a female, so no issue there. The first issue we noticed with him and male people was when a friend of my fiance's came over to do some work outside and he had Klause outside with him and he was not at ease around him at all. When my daughter and her boyfriend came over with this other friend, I didn't know he was even with them or I would have taken the dog downstairs or outside. When Klause saw this guy he started barking and jumped up on him and then sat down and tried to bite him on his back pocket area. Thankfully he was wearing Levis so nothing happened, and by that time I had Klause and had taken him downstairs. Our basement is where his kennel is, and it's got another living area and where I sleep, so it's not like it's a cold dark dank place. So now if you've managed to read all of this, my boys will be here for 2 weeks, and I need to figure out how to keep the peace between everyone. He's outside right now, and I will leave him out there until we head to the store. I live in Cheyenne Wyoming so if anyone knows of a good trainer in this area I would be interested in that information. I've had dogs all my life and this is the first one that after having in my home for this long was still so much of a work in progress. I hope I've answered most all of everyone's questions. I think someone asked about aggression or fear - not sure how to tell the difference as I've never dealt with this sort of behavior in a dog before.