Tomorrow morning will see Ajay Devgn head out for his fitness regimen -- only, this time, he will swap the gym for Mumbai roads and keeping him company in his workout will be his German Shepherd, Koko. As part of the second edition of a petathon, pet owners and their canines will gather at MMRDA Grounds in Bandra for a mile-long marathon. The initiative aims to increase awareness around pet health and give tips to owners on better parenting of their four-legged friends.