Posted : 9/17/2011 2:37:12 PM
All I can do is offer my experiences. When GSD Heidi was a little over 2 years old, we brought home rescued GSD mix Bruder who we figured was almost 1. They got along famously right off the bat. Although after a few days Heidi was wondering why this newbie was still hanging around. The very first time I took all the dogs for a group walk, Heidi hung back behind us sulking the whole way.
But soon...she realized he was staying and the walks progressively got better.
I was feeding them all together...about 10 feet apart...but when I prepare meals...they sit close to me. After about a week....Heidi didn't like the fact that he was still here (I suppose); and when they were all close to me as I prepared...a fight broke out. So, I fed them separately in kennels. They were next to each other, could see each other. I did this for a month or so...then slowly started weaning them back to feeding them together...as I said, though they ate (and still do)...about 10 feet apart.
Every thing was hunky dory....then after Bruder was with us about a year...he started testing the waters to see if he could raise his level on the totem pole. It happens. Packmates will try to see if they can move themselves up in the chain. That was short lived, when he realized that Heidi had placed her self as topdog. He now knows his role.
So, my point in all of this is Oliver might be testing the other dogs trying to prove to the others he wants to be topdog.
I'm no trainer...so I certainly don't want to offer advice. But, we have some awesome folks here on this board who can offer advice. Good luck!
Bull Terriers are on my bucket list of dogs. Would love to see pictures of your Oliver.
Oh, and I'm on the side of neutering and spaying after the dog reaches maturity (18 months) if at all feasible. In other words...no chance of escape or accidents.