My heart is breaking - I'm going to have to return Blue to the shelter.
He just arrived here Monday evening, as many of you read. Things were wonderful, he was coming out of his shell, loved everyone and we loved him. Last night, my 21 year old son decided to spend the night here and he wanted my first dog, Casey, to sleep in his room when he usually sleeps in mine, so I let Blue sleep on my bed. When I woke up this morning, he was using my foot as a pillow. He was just absolutely adorable and I spent a few minutes petting him and telling him how cute he was before we got up so all three dogs could go outside. I think that was the big mistake - letting him sleep with me because now he thinks I belong to him and doesn't want to share me.
Later in the day, I was looking out the front door because my dad, who has cancer and congestive heart failure was outside and Casey came and stood beside me so I petted his head. Blue went nuts, attacked Casey like he thought he was Cujo. I picked him up and put him in a kennel. Casey is big, but he was the runt of his litter, the one everybody picked on and he's just not a fighter, all he wanted to do was get away. His leg was bloody so I washed it and let him go sleep on my bed with the door shut. Took dad to the hospital for treatment, came home and went to let the dogs outside and Blue attacked Casey again. He did it twice more so I just let him stay outside with my other deaf dog. Casey came in and hid in the bedroom. I looked outside to see what the other two were doing, and Blue was ripping the screen off the patio doors and had already shredded the bags of topsoil I'd bought an hour before. He attacks Casey every time they're together and I just can't let him do that. Poor Casey is being terrorized by that little guy. He's deaf, so I can't even yell at him and I will not hit him, so I just don't know what else to do but take him back.
He's wonderful with people, from little kids to the elderly. He likes the cat. He just doesn't want to share people's affection with another dog and he needs a home where he's the only dog. He sure did come out of his shell today, but I so wish the result had been different than it is. I keep hugging him and telling him he's gonna have a good life from now on, but I feel so sad that he can't stay with us and I can't stop crying...
= new reply since forum marked as read
a year ago. She can be a pain in the neck, too. She'll wants all the treats, so I have to make sure they sit next to each other and get a treat at exactly the same moment. If we try to give Casey his two seconds after hers, she wants his too, and she'll attack him. I can deal with that. But I just can't deal with a dog who bites and attacks him for no reason like this one is doing. It's not fair to Casey and I know that if Blue stayed here, someone would always have to be locked in a room and I don't want either of them to have to live like that.
Casey is such a good dog; he's the love of my life these days and I can't let a little dog make his life miserable. This is Casey -
I have had similar situations trying to add new pets to my household.
I have a firm rule. The original pets get priority over any newcomers. You simply can't allow a resident to be terrorized by a newcomer. And under no circumstances do you get a new pet and then give the old one away if there is a problem between original pet and new pet. (There might be some circumstance where I could see that rule being bent... but it would have to be extraordinary.)
I am so sorry, I know how hard it is. 
This totally sucks. 
