Oh, I forget some of you haven't been around from the beginning 
Here's the brief version:
I adopted Kaiser from a shelter at the end of January. He's a GSD/corgi mix. We think he was about 8 months old at the time. We soon discovered that he got really nasty if you tried to take his favourite snack from him - kleenex. He also growled and got snippy if it was something else he really treasured, like apple cores. I thought, okay, not good, this is going to take a ton of work. Me, Kaiser, and my boyfriend Matt all live in a townhouse where we have a small unfenced front yard. I'm a jogger though so he got lots of exercise that way. He's great, the most intelligent and human dog I've ever met. He learns extremely quickly and gets bored just as easily. He quickly learned (with the help of a mister bottle) that Matt and I will not tolerate nipping or growling, and for the most part is fine with us although for the first few months he snapped at me quite a few times. Anyway, we are university students and often go to our parents' houses for the weekend. My sister, who still lives there, is weak and fragile and suffers from anorexia. She became his target and he often snapped at her for no apparent reason, and always when food was involved. One weekend he bit her and left a gash under her eye. Before that I tried many trainers - all of whom screwed us over in the end. After the bite I went through a long debate with the others on this board about whether or not to have him euthanized. I decided I owed it to him to try every single resource available to me and found an amazing veterinarian behaviourist. We worked with her for a long time, and Kaiser did improve immensely to the point where I can take anything from him now without a growl. Then there was a serious accident on the way home from a family reunion where my aunt and uncle and Matt's grandfather were killed. All training ceased and my mom's assistant gave him his daily walks. At this point I was living back with my parents for the summer while I work an amazing job. On one particularly stressful day, Kaiser, as he often did, tried to steal my sister's food off the counter. She swatted him down, he snapped and she'd had enough - she pinned him to the ground and yelled at him. He hasn't snapped at her since, and that was at least a month ago. During the 6 weeks or so I was concerned with putting my family back together our behaviourist came to me and asked if she could take Kaiser for a couple of weeks, just for a few hours every day, to work with him. I had no time, and Kaiser and I both trusted her, so I agreed. After a few days of this Kaiser seemed very low spirited. I mentioned it and Yvonne said she just stepped up his restrictions a little more, he's just pouting. 3 weeks later he came back with a small bleeding scratch on his paw. A week after that he had another bleeding cut on the back of his head. Kaiser, by this point would hide when Yvonne came to get him. I talked to my vet that evening, and Kaiser will never go back there again.
That's the history. I've spent thousands of dollars on trainers and behaviourists that all caused even worse problems for us and I refuse to do it again. I should also mention that he hates kids and has since he chose me at the shelter. Even so much as a child's voice outside sets him growling and snarling with hackles raised. He came to me with big problems and while certain issues have all but disappeared some will not improve - although none are any worse. Last night my 8 year old neighbour came over. She's been told millions of times not to enter the back half of the house (it's a huge, huge house so keeping them apart is very easy.) because "Kaiser's mean to kids". She 'forgot' when she went to visit the parrots (she walks in and out of our house freely, always has, since she was old enough to walk) and Kaiser jumped at her. He left a small nick on her jaw and buggered off when my brother came to see what the problem was. She's fine, but it could have been much worse.
After he bit my sister, we took every precaution to keep the two of them apart while in the house. I said that I would keep trying to help him understand but if he ever bit again I'd have to have him put down. I'm in love with this dog and he's my best pal, and while I wasn't willing to muzzle him before I am now. Mikaylah won't be back in that part of the house, and every person coming to visit has to let us know at the security gate that they're there. That gives me time to put him in another part of the house and/or muzzle him. And nobody has ever, ever walked into our house unannounced except for Mikaylah. And at school nobody under the age of 20 ever comes to our townhouse except for my sister, and he's fine with her now. Anyway, there are too many circumstances to explain, but I know that as long as he's adjusted to a muzzle, with a few minor changes to the way we do things, I can keep him and everyone else safe.
Hehe, I know this is long, but you asked and it's definitely faster than reading through the posts for the last 5 months 
