Possible lost dog

Someone just posted this in the Crouch End Appreciation group on FB, so I thought I'd share it about in case anyone has lost a dog:

I could hear someone calling out for their lost dog billy about 5 mins ago.
I've just seen a dog, medium small sized brown run into the shepherds hill allotments.
This is a long shot in case Billy's owners (who have now stopped calling for him) are still out there looking. I'll stand here with dog treats and a piece of rope for a little longer tho can't see or hear him anymore.