The RSPCA is appealing for information to trace a dog owner who slaps his dog around the face in sickening footage.
The charity has launched an investigation after the clip circulating on social media at the beginning of October.
The 30-second clip shows the man getting out of his car and walks to a black pick-up truck where two Bordeaux mastiffs were sitting at the back.
One of them can be seen poking its head out of the window and looking at the man who puts out his hand and appears to give them food.
The dog stares for a moment and the man suddenly slaps the animal in the head. It barks in return and a second Bordeaux mastiff emerges.
RSPCA investigators believe the video was filmed in the UK - due to the number plates of passing vehicles - but it’s unclear where the incident occurred.
The man is described as white, with fair hair.
He was wearing black shiny shoes, black trousers and a white, long-sleeve t-shirt.
Anyone who believes they recognise the dogs, know where this incident took place or has any information on who is responsible should contact the RSPCA appeal line on 0300 123 8018."
