Letter: Natural diet?

Sir: As well as the usual debris left in our garden after their nightly orgy (eg, one pigeon, McDonald's and Kentucky Fried wrappers, sweetie papers, plastic cups and fish and chip papers), yesterday our foxes abandoned a champagne cork (well chewed). What have we done to our wildlife?

Yours faithfully,

J. S. BROWNSORT

London, SE13

27 July