You seem like very cool person , I mean not everyone would admit these things , some people would just keep blaming the dog and they would actually be really bad to her . So I am really glad you are so mindful here ! That is very good ! I think it is okay feeling anger towards her , I would feel the same and I would not want to give her attention too , it is okay . When you can ' t give an animal a good attention , then you should not give it any other kind of attention really , because animals just get things differently than people of course . Oh yes I hope she didn ' t suffer too ! On the other side when you say they were two girls , maybe they were just jealous of each other . I mean it happens sometimes . Also you have to think about the option that maybe she didn ' t intend to kill her . Maybe she just really was too harsh to her as she was bigger than her . My cousin had two really big dogs a they were amazing really kind and stuff , but accidently one of them catched her chin with his mouth and even thought she knew them since she was little and they would never hurt her , he ripped her chin and she has scar big a thumb on her chin till today . and it ' s over twenty years . Of course he didn ' t want to , but yeah big dogs are sometimes dangerous to others without wanting to . I get what you mean . I had that dog that I was talking about since I was in my moms belly really . she was just few months older than me and we grew up together and she died when I was 12 and I also felt all kinds of emotions and that I could spend more time and do things differently . So Im sorry for your loss ! Oh so sorry for that ! I wish you had time with your dog . The things that you could have done are the worse really . the regrets . I know some too , but hey think about the good things more . About the things you did right . You have to forgive yourself , because hey , you know how dogs are amazing right ? I mean I know it , they are amazing , they want you to smile and they love you no matter what , unconditionally , no matter what you do they always forgive . And they think about their parents the best . And trust me , that even if you think you didn ' t enjoy enough time with her , SHE ENJOYED EVERY SECOND WITH YOU ! Just as your old dog did too ! ! So forgive yourself , maybe you didn ' t do everything you wanted , but it was enough for them I am sure !