A grandmother suffered horrific injuries after a vicious dog clamped its jaws around her arm and dragged her into a bush.
Pensioners John and Jane Perret were walking home along a riverside path after a night with friends when the snarling Staffordshire bull terrier struck .
The five-stone dog - which was on an extendable lead - approached the elderly couple before launching at Mrs Perret, 69, without warning.
Her 75-year-old husband watched in horror as the dog savaged his wife, sinking its teeth into her arm before dragging her along the floor and into a bush.
Mr Perret managed to force the dog's jaws open but was then bitten by a second deranged Staffie being walked by the same man.
The terrifying attack only ended when the owner brought the dogs under control but then gave the couple a fake name and address before fleeing the scene in Boston, Lincolnshire.
Mr Perret rushed his wife to Boston Pilgrim Hospital with a gaping two-inch wound to her arm where she was given seven stitches and a tetanus jab.
The pair have now released shocking pictures of Mrs Perret's injuries to her right forearm in a bid to try and catch the callous dog owner who is being hunted by police.
Mr Perret said: "The guy with the dogs was coming in the opposite direction and my wife moved to get out of his way because it was a narrow path.
"Without warning the dog just leapt out and grabbed her arm and dragged her into the hedge. There was no warning.
"It was a matter of seconds but even so there was a lot of blood. When I took hold of its jaws to force them open, the other dog had a go at me. But it wasn't able to get a proper grip on my arm.
"I think they were bull terriers. They were very stocky dogs with a rather bow-legged look, one was white and one was black.
"The owner kept saying sorry and gave a name and address and I memorised it but when the police went around they didn't know anything about him.
"At the hospital they gave us both a tetanus jab and my wife was stitched up. "A flap of her skin and flesh had been ripped back and you could see all the fatty tissue underneath.
"But it could have been a lot nastier if the dog had a second or two longer."
The couple, who have three daughters and eight grandchildren, now fear the dogs could attack and kill someone else.
Mr Perret, a retired teacher, added: "We are really concerned as my wife's arm is the same height as a child's throat. "A wound like that on a child could have disfigured them for life or even killed them.
"Those dogs ought to be muzzled and now they have the taste for blood they should probably be put down.
"It was a traumatic experience. I felt very angry and concerned, my wife is still traumatised after the attack.
"It was the first time I looked at her and thought she looked old. The shock has really hit her." Jane, also a retired teacher, said:
"They were walking towards us with their owner on an extending lead and they weren't muzzled. "I stepped to the left on the grass and the dog was on me and dragging me into the hedge.
"It was so painful and then the other dog bit my husband. It all happened in a blur, it was like a dream. "The man stood there saying he was sorry and it happened because it was dark and the dog was afraid."
The dog owner is described as being in his late 30s to early 40s, with dark hair and said he was of medium build and an average height.
Police officers have trawled CCTV at both ends of the walkway but the dog owner had not been picked up by the cameras.
A spokesperson for Lincolnshire Police added: "The owner of the dogs has given false information so we'd like to hear from anyone with information about the dog or the dog owner.
"Those with details should call 101 and ask for the officer in the case, PC Steve Clark, and quote incident number 500 of October 27."