Belle and Marley

I'm having a problem with Belle and Marley my parrot. For some reason whenever Reuben barks at the door Belle decides to charge at the parrot cage and start barking at the bird.

I tell her off when she does it but she just won't stop. The problem is when I am at work as there is no one to stop her and I really don't know how to stop the behaviour? Thankfully she cannot get to the bird as we put extra security on the door after finding the latch partially opened so now even if the leach opens the won't open.

How wierd is that, I wish I could help but I'm afraid I don't know what to say hun xx

There has been no improvement and despite moving the chair away when we are out she still does it when we are in.
I was hoping we could get her out of what has become a bad habit

I honestly don't know what to say Jo, wish I could help in some way xx