11yr old Black lab collie x Missing

This is Jet our beloved family pet. She went missing Sat Oct 26th at around 9pm from Ballybrack, Carrignavar. Can anyone in the Carrignavar, Watergrasshill, Glenville area please keep an eye out for her. She is a medium sized black lab collie cross 11 yrs old. She has white markings on her chest and paws. We are very worried about her. She has never run away before. Any sightings or information would be greatly appreciated.