On Jan 28, 5:34*pm, Lobster wrote:
the_constructor wrote:
I had thought of putting nails on top of the bird box to deter the cat, but
I do not want to harm the birds. I thought of putting a strip of nails on
top of the shed above the bird box, but there again it may be harmful to the
birds. Then I suggested to the wife that stay on guard duty every night, but
all I got was a wallop across the lughole.

Any suggestions please?

Try this: http://tinyurl.com/32spg9
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160202204685&ru=....

hth
David

wear a crash helmet