Two Cats and a Dog Suspected of Spying For Germans in WW1 (Navy, officers)

[Bamford]

First World War British intelligence officers on the Western Front suspected two cats and a dog of spying for the Germans.

Cats of war: Animals suspected by British of spying on WW1 trenches - Telegraph

[Bamford]

Not all cats were traitors though, indeed Simon the Ships Cat on HMS Amethyst Royal Navy famously won the Dickin Medal for Bravery, which is the animal equivalent of the Victoria Cross or US Congressional Medal of Honor.

Animal bravery awards - PDSA Dickin Medal

BBC NEWS | UK | England | Devon | Wartime hero cat Simon remembered

BBC - Radio 4 - The Animals VC

Recipients of the PDSA's Dickin Medal, the animal version of the Victoria Cross - Telegraph