Roy Woods had been talking on a hands-free phone when he hit Alan Couper outside a golf club last year.
Charity's Warning On Guide Dog Attacks
A charity's warning that attacks on guide dogs by other dogs have reached a new high.
The Guide Dogs for the Blind Association, which breeds and trains dogs for the blind and partially sighted, said more than eight attacks are being reported each month.
Campaign manager David Cowdrey said:
''An attack on any dog is frightening, but for a guide dog owner it is much worse.
''As well as physical injuries, each dog attack leaves a deep psychological scar for both the owner and the guide dog.
''In the worst cases guide dogs have to be retired early; in others they are left unable to work for a significant amount of time.''
The charity is urging the Government to introduce compulsory microchipping for all dogs to protect the vulnerable and control aggressive animals.
Ministers announced plans in April to crack down on dangerous dogs but the package of measures did not include compulsory microchipping of all dogs and critics claimed it did not go far enough.
Jemma Brown, 23, whose guide dog Gus has been attacked six times, said: ''One of the worst attacks was outside a coffee shop on the high street in Southampton.
''This dog came charging towards us. It pinned Gus to the floor and the dog's owners couldn't get the dog to let go, so they started punching it in the head.
''But they caught Gus a few times too and he was left concussed. He couldn't work for three weeks.''
Mr Cowdrey called on the police to take more decisive action when a guide dog is attacked.
He said: ''Ultimately we want them to be given the power to treat an attack on a guide dog or any other assistance dog like an attack on a person.''
Men are less likely to talk than women with 54% of women having had a conversation compared to 37% of men.
Theresa May has now signed a letter to trigger Article 50, the start of the official process to leave the EU.
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