I too believe that the #2 is due to being very stressed over the new addition. I am not sure that x-pening them in the same room is a good idea. Since Chester was there first and has earned his position in the "pack", could you perhaps keep him x-pened in your bedroom and keep Zoe where you used to keep Chester? Sleeping with you is a privledge and may make Chester feel more secure.
Also, I think you need to speak to a vet or a trainer on how to deal with the fighting issue. Dogs have to (must) establish a hierarchy in the "pack". Part of doing that is showing dominance and keeping the new "guy" in place. So breaking up a fight is not always a good thing. Of course you want to supervise the fighting so that no one gets seriously hurt. But fighting is almost a necessity and should not necessarily be curttailed. Chester's inability to establish his "pack" position may be causing part of the stress.
I know there are right ways and wrong ways to go about allowing the dogs to fight and clearing the air. It also may take several times, before things calm down, so you do want to talk to a specialist (like your vet or a trainer) about it and make sure that you take the right approach. |