When the Anzac Day parade gets underway at Campbell Town there will be a special message for the unsung heroes without a voice.

Cocoa, a Chesapeake Bay Retriever, will be representing animals in war.

The dog has been part of several commemoration marches and services over the past few years including events in Hobart, Longford and Campbell Town.

On Thursday, she will be carrying first aid bags that would have been used to treat wounded soldiers in dangerously exposed positions, such as minefields.

She will also be wearing a messenger collar, used in war to carry vital messages to and from the front-line.

Terese Binns, who was helping the Launceston RSL sell Anzac Day tokens on Wednesday, said many different types of animals who served in war formed an enduring partnership with the humans they served - often with a great sacrifice.

"Our aim is to ensure that the deeds of war animals do not get lost and to educate the public that not only two but also four-legged diggers served this nation," she said.

"We should remember their contributions and although difficult to calculate, their presence and work must have saved many lives.

"Whether this be by directly carrying wounded soldiers - horses, donkeys, mules - or just their simple presence and touch that aided moral. They are unsung heroes who do not have a voice."

More than 16 million animals served in World War I, for transport, communication and companionship.