Rocky has 3 times now eaten the letters when I have been out and the postie has come so altho he doesn't do it every day, I want to get a letter cage to put on the door to stop him.

Does anyone know one that can just clip onto the letterbox rather than drilling holes in the door as we have a steel front door and hubbie is loathed to drill into the door???

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Proud owner of Rocky the Yorkie, born July 2008, who came to live with us at 8 weeks old
and
Ellie the Yorkie, born February 2012, who came to live with us at almost 8 weeks