One of the workers is in charge of the camp mascot (4688619430)

A smiling British volunteer is pictured with the dog that acted as her regiment's mascot. The adoption of dogs as mascots by British regiments reflects the important military roles fulfilled by dogs as far back as ancient Egyptian, Greek and Roman times, where dogs were variously used as sentries, messengers and trackers.
Although this mascot may have had a more symbolic purpose, dogs did fulfil a variety of practical roles during World War I including hunting for rats, carrying food and ammunition, and pulling carts and sledges. The regiment this dog was attached to was the Queen Mary's Army Auxiliary Corps.
[Original reads: 'OFFICIAL PHOTOGRAPH TAKEN ON THE BRITISH WESTERN FRONT IN FRANCE. A detachment of the Q.M.A.A.C. encamped in a big forest in France. One of the workers is in charge of the camp mascot.']

http://digital.nls.uk/74549144