He invited video producer Justin Gane to film them in action and together they came up with the Radical Rodent clip.
Mr Gane said: “I’d never seen anything like it before. I’d never have believed a little mouse could turn a surfboard on a wave but they have a really good sense of balance.
“We get some negative comments on YouTube from people who think it’s cruel but Shane really cares for those mice.
“They’re really clever and get very excited when they go surfing. Shane washes them with fresh water afterwards and he won’t take them out if the sea is too cold.”