This is the heartwarming moment a caring pet dog climbs into a playpen to sit alongside a sleeping baby.

Keekee, the black pooch, hopped into the crib and sat next to Sherlyn, the one-year-old girl, in Surin, Thailand, on October 20.

CCTV footage shows the canine gently pawing the child, prompting her grandfather to stand up and shoo it away to prevent her from waking.

The dog eventually stepped out of the bed and joined its Golden Retriever companion on the floor.

Homeowner Nattapon Meekaew said: 'There will always be one dog who tries to wake the baby. Good thing she didn't wake up.'

Animal behavioural experts said that dogs often act differently around babies, appearing to treat them with extra care to ensure they do not get hurt.