Firefighters responding to a call for help rescued a dog who fell in a sewer.

Britney Welter and her friend were both walking their dogs when the 4-year-old black Lab fell down an open sewer in the Cook County Forest Preserve in Oak Forest.

The girls told police they were running from coyotes when the dog dropped through the open manhole.

Welter said her dog was not injured in the fall.

The fire chief said he’s not sure why the sewer cap was left open, but they have resecured the lid.

“Thank God it wasn’t the owner, because the girls were running here … and, as she said, it could have been her as easily as it was the dog,” said Oak Forest fire chief Lindsay Laycoax.