Bull Terrier cuts down junk mail!

We have discovered that owning a Bull Terrier drastically affects what is delivered through our letter box... In our front door we have a catflap, a legacy of a long-departed feline resident of the flat. Onion has decided to make full use of this mod con, not as a door -- she may be a mini, but she's far from cat-sized -- but as a viewing station. The sequence generally works as follows: (1) the front gate squeaks, alerting Onion to the possibility of visitors; (2) she hurtles to the front door and *bang*, her head explodes through the catflap like a battering ram; (3) (usually) the person delivering the takeaway menu / religious tract / minicab card hesitates then, realising that the letter box is positioned below the newly arrived dog-head, beats a hasty retreat without attempting delivery. Result: a noticeable reduction in junk mail!