And the club hopes the new savage slogan will highlight the plight of the shy vole.
James Silvey, from the Trossachs Water Vole Project, said the voles now had an "established population" in the forest.
Water vole numbers have crashed due to predation and loss of habitat.
Chalk streams in the Lincolnshire Wolds are shallow, clear and oxygen rich, supporting a wide variety of plants and wildlife, including the water vole.
The British Vole Club blames the imported American minks - many of which have escaped into the wild from farms - for the decline in voles.
Steve Lowe, from the Northumberland Wildlife Trust, said a similar project had been carried out in the Cairngorms, which saw the water vole making an "impressive comeback".
Other organisations involved in the water vole reintroduction include the Royal Zoological Society of Scotland, Scottish Natural Heritage, Loch Lomond and the Trossachs National Park and water vole expert Derek Gow.
The 2009 Paddy Power Gold Cup winner obliged at 5-2 for trainer Edward O'Grady, ahead of J'y Vole in second, with former RSA Chase winner Cooldine out of the places for Mullins.
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Numbers of the British vole - which inspired Ratty's character in the children's classic The Wind in the Willows - have plunged from seven million to less than a million in a decade.
"We hope that this project will not only see the waterwheel turning again for the first time in decades, but will also see a return of water vole and other species to the mill pond and leetes, " he said.
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