Missing dog as photo (GL6 6)

Small sized dog black and darkish chocolate brown, usually right ear up and left ear down. Missing since 9th December and could have been picked up & being looked after. Polo was let out within a netted hedged enclosed garden for a late night wee before bedtime and never returned. Very friendly and affectionate. Her muzzle has a bit of white and grey hair mainly around lower jaw. She is 11 yrs old. We are desperate to have her back home. Please get in touch if you have her or have seen someone with her. Many thanks indeed.