We have two 10 month old border collie mixes we got when they were 11 weeks, one is very hyper and playful and has adjusted well to being in our home beyond a few things we are working on and I have hope we will be able to smooth out with either age or on going training. The other has only gotten more and more anxious to the point he's fighting with his brother and growling at my kids on occasion unprovoked.

The pups do really well when separated, they don't seem to even notice the other isn't around, they have always slept in separate rooms since we brought them home. They go on walks separately and have a really good grasp of sit and stay and a few other "trick" commands. They are pretty bonded to us so I'm not overly worried about it being littermate syndrome. The one is just not coping well in our home, I'm heartbroken at the thought of rehoming him but if he is unhappy with us I don't want to force it. At this point we are having to crate and rotate the two because he will just attack his brother seemingly unprovoked, the last time they weren't even in the same room when he started growling at him. They do separate really easily when it does escalate and it's never caused any actual harm, no real bites just aggressive growls and angry barking and nipping at each other in a not at all playful way.

He's a very sweet boy otherwise who will cuddle and loves to chase a ball or play tug of war and roll around in the grass and I know he's a really good dog I just don't know how to help him. I've done all I can to build confidence and help him overcome his fears but what I'm doing is clearly not working and we just don't have the resources to hire a behavioral specialist. I'm at the end of my rope and I just feel anxious all the time now worrying about him and about how this is affecting my kids. It's gotten to the point I don't really feel comfortable having my kids alone in a room with him because he's so unpredictable. He's never even nipped at a person, but I don't want it to get to that point. We love him dearly, I just feel like I have failed him. Last night we decided it was probably best that we re-home him but I still feel awful. Tell me this is what's best for everyone.