A dog walker was knocked unconscious as he tried to save his pet from another dog.
The man was smashed in the side of the face as he tried to separate his dog from another in Crow Nest Park, Dewsbury.
The victim was left with serious facial injuries including a fractured eye socket and a broken cheekbone.
Detectives are now seeking information about the nasty incident, which occurred in the early hours of Monday, June 8.
The offence was only recently reported to the police.
The 26-year-old said he was walking his dog on the rugby field at the park between midnight and 1am when a dog off its lead attacked his dog.
As he has tried to prise the dogs apart he was struck to the side of the face with an unknown object causing him to lose consciousness.
It is thought he did not see, or cannot remember, who his attacker was.
DC Richard Grace, of Kirklees District CID, said: “Unfortunately given the nature of this attack we don’t have any description of the suspect.
“The dog involved in the attack on the victim’s dog was a large, black, short-haired Mastiff-type dog and we presume this belonged to the suspect.
“Some time has passed since this assault but we are hopeful that someone may recall something from that night which could help our ongoing enquiries.
“We are also keen to speak to anyone who has seen a dog matching this description being walked around this area at another time who might be able to assist with further information about the dog’s owner.
“Anyone with information is asked to call Kirklees District CID on 101.”
In unrelated investigations, police would like to speak to the people pictured in the image gallery below. The people pictured in the images may be witnesses as well as suspects. If you recognise anyone, contact police on 101 quoting the reference number on the image caption.
