SIR – Throughout the history of human conflicts, animals have been victims of war. During World War I, dogs and pigeons were used to deliver messages between frontline trenches and further afield.

Horses, donkeys and even elephants have been routinely used as beasts of burden, while a shocking array of animals – from bears to deer – have been kept as pets in the midst of battle.

Today, animals continue to be used in the battlefield to detect explosives, and thousands suffer and die each year in laboratories, infected with biological or chemical agents, or deliberately shot or otherwise damaged.

To commemorate all the animal victims, Animal Aid has issued a purple poppy, which can be worn alongside the traditional red one, as a reminder that both humans and animals have been – and continue to be – victims of war.

The purple poppies cost £1 each (including postage and packing) and are available from animalaid.org.uk or by calling 01732 364546. A free copy of Animal Aid’s colour booklet, “Animals: the hidden victims of war”, accompanies each order.

Kate Fowler-Reeves, head of campaigns, Animal Aid, The Old Chapel, Bradford Street, Tonbridge, Kent