Neela required emergency veterinary care after the attack
A guide dog has made a full recovery after being savaged by another dog at a north-west London railway station.
The brown labrador, named Neela, was attacked by a terrier-type dog at Cricklewood station in October.
Its visually impaired owner, who did not want to be named, said she was "so relieved" that Neela has recovered well from the "horrendous" ordeal.
British Transport Police received "a lot" of information after the attack but no-one has been arrested.
The attack happened on 4 October when the woman passed a man drinking a can of beer in a station underpass who was with the terrier-type dog.
The unleashed dog ran towards the 57-year-old woman and attacked Neela.
The woman kicked and punched his dog in a bid to stop the attack.
The labrador was left needing emergency veterinary care for deep puncture wounds to its neck.
The woman said: "For her to be attacked in such a vicious way, when she was doing her job assisting me, was a horrendous experience and one I hope no other guide dog owner ever has to go through."
She added: "It was only through the good luck of a helpful passer by that the police were called to help me.
"I feel the person whose dog it was has no idea of the situation he left me in and the profound effect on the dog, leaving it anxious and in great pain after the attack."
The woman described Neela as a "wonderful" dog and said Neela's recovery and return to work was testament to her "amazing strength, temperament and training".
A spokesman for charity Guide Dogs said: "This was a traumatic experience for the guide dog owner. Happily her dog has made a full recovery.
"However, there have been tragic cases in the past when guide dogs have suffered psychologically - impairing their ability to continue safely guiding their owners."
The man was described by police as white, in his mid to late-20s, around 5ft 11in (1.8m) tall and of slim build.
He had a cropped beard and brownish to red hair which was cut short and was wearing black tracksuit bottoms and a grey top.