A man was knocked unconscious after being assaulted when walking his dog in Lupset.
The 66-year-old was seriously injured in the incident which took place in fields behind on Airedale Heights at around 10.30am on Saturday, June 21.
Detectives said the man was approached by two Staffordshire bull terrier style dogs which behaved in a threatening manner.
The victim, fearing the dogs were going to attack him, shouted and kicked out while trying to restrain his own dog.
He was then assaulted by a man who he presumed was the dog’s owner.
Det Con Fay Wroe, of Wakefield CID, said: “We are appealing for witnesses to this offence and would like to speak to anyone who saw what happened or who knows the suspect who is described as white, aged 30 to 40-years-old, around 5ft 8ins tall, of stocky build with straggly dark hair going grey.
“He was unshaven and wearing blue jeans with a dark jacket.
“One of the two dogs was described as a pedigree type with a white chest. The second was described as grey and potentially a cross breed.”
Anyone with any information should contact Det Con Wroe on 101 or Crimestoppers anonymously on 0800 555 111.