SIR – The War Horse story, which has resonated with so many people, is a poignant and timely reminder of the fate of millions of animals drawn unwittingly into human conflicts.

Any readers wishing to find out more about the use of horses – and other animals – in war, should contact Animal Aid for a free copy of our Animals in War booklet.

The publication details the ways in which animals have been used as messengers, for detection, scouting and rescue, as beasts of burden and on the frontline.

Meanwhile, in UK laboratories, thousands of animals still suffer and die every year in invasive warfare experiments.

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