Our old dog passed yesterday. She came to us as an older rescue, recovering from a bad case of heartworm and years of neglect. She was a good girl, but I think her earlier life had left her very self-contained and unable to really bond with humans. A month or so after we got her, she started barking madly at dogs, sketchy men, and any other perceived threat. I think she had decided that she liked life with us, and was willing to do what it took to stay, even if that meant becoming a guard dog. In the last few months, she has become a skinny, patchy version of her former self. A good lady.