Normally in the wild, an abandoned bear would be rejected or even killed by other adults.
But the team of experts from the UK-based Born Free Foundation and the Manitoba Conservation group managed to hide the cub's scent using a vapour rub, normally used for colds.
Then they put the cub with the mum and another young female bear.
This meant the mum couldn't smell any strange scents on the cub, so assumed it was hers.
All three were then released into the wild where they were spotted playing happily.