Petbarn's new Pet Pulse report looked at the breeds of more than 750,000 puppies to determine which was most popular.

It found cavoodles, a cross between a poodle and a Cavalier King Charles spaniel, was the top choice for Australians between 2016 and 2021.

Labradoodles and groodles also made the top 20, with another five poodle crossbreeds listed in the top 100.

"All the data confirms it is a real thing because it's definitely the impression I've had as a practising vet," Michael Yazbeck of Greencross Vets told AAP.

"The obvious thing is they're really cute dogs. A lot of people are looking for something with that puppy look and a generally friendly demeanour."

With more people keeping their dogs inside during the pandemic, Dr Yazbeck said 'oodle' breeds proved to be a more allergy and family-friendly option.

People only started breeding oodles in the late 1980s but the Pet Pulse report found they now account for one in five dog births in Australia.

That's not expected to change any time soon, according to Dr Yazbeck.

"It's like a designer crossbreed. You've got a group of dogs but such variation in colour, size and look that really appeals to people," he said.

Australian Associated Press