Oklahoma City council members amended a city ordinance Wednesday to redefine when a dog is to be considered dangerous and menacing in response to an April dog attack that left a northwest Oklahoma City woman dead.

The city council also adopted new rules to be followed whenever a dog is impounded by animal welfare officers.

The city ordinance changes — set to take effect 30 days after the council's decision — passed unanimously and without protest.

The changes stemmed from an April mauling in northwest Oklahoma City. Police said two dogs attacked and killed Cecille Short, 82, and her dog, Taylor, while they were walking through her neighborhood.