Hello,
I have two cockapoos; sisters/littermates; together since birth. They are 18 mo. old and very well behaved. They do the typical sit/stay/fetch, down, and stay until released.
When I give them permission to pass through the opened door out onto the porch, the one turns and snarls, growls, and tries to bite the other on their way outside. She is not the Alpha and has always challenged me for the position. Now, she is beginning to sound vicious.
I have begun commanding her to stay, while giving the Alpha sister permission to go out first, but this is becoming time consuming.
What message am I sending to them, and is this the appropriate way to handle "doorway aggression?"