There's something extraordinary about Finnegan, an Irish wolfhound from Calgary.

The dog has the world's longest tail — officially listed in the Guinness World Records 2015 Book at 72.29 centimetres.

Finnegan’s co-owner Evangeline Leclair says after three-and-a-half years she has learned to put away anything breakable.

"He's broken several wine glasses. He's knocked over a few wine bottles," she said.

Co-owner Evangeline Leclair says Finnegan's tail can cause trouble from time to time. (CBC)

"I've been hit in the face a few times.... Sometimes when he wags it, and you're sitting on the ground or you're sitting on a chair, it might go into your mouth."

Finnegan is a big dog, but at 55 kilograms — or 121 pounds — he is actually small for an Irish wolfhound.

The letter declaring Finnegan's world record came in the mail last month. Leclair says a vet was required to measure the tail three times with a witness. The process was videotaped and submitted to Guinness World Records.

The previous record was held by an American Great Dane named Bentley.