Milly's always been very good about asking to go out. She starts twirling and then runs to the kitchen door and continues to twirl until it's opened.
We didn't have to teach Chaz anything, he very quickly picked up on Milly's routine and now, at six months, does exactly the same.
Slight problems can arise when they both want to go as two rotating cockers, especially when they're going in opposite directions, sometimes makes it difficult to actually get to the door to open it.
Try to pick up on any signals or behaviour that Bracken may show when needing to go and work on that, lots of praise and encouragement and maybe even a small treat when he does get it right.