David Marshall, 86, was walking through Hagley Park on Tuesday morning when he was attacked by a dog.

An 86-year-old man was left hurt and bleeding after he was attacked by a dog while walking through Christchurch's Hagley Park.

David Marshall was walking inside the park near Park Tce about 8.30am on Tuesday when a small dog charged at him and latched on to his lower left leg. The gash had to be bandaged by his GP.

Sarai Marshall said she and her father were both shaken by the attack and urged the dog's owner to learn to control their pet.

IAIN MCGREGOR/STUFF The wound to his left leg needed to be bandaged by his GP.

"We don't want her prosecuted or the dog put down, but she does need to control her dog to keep other people safe."

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It was bad enough her father had been attacked, but it could just have easily happened to a young child, she said.

The dog owner had to physically pull the dog off her father. She offered to make sure he got home safely, but he did not want to be followed home. Marshall said the owner expressed concern for her father, but did not call an ambulance for him or take his phone number to check up on him later.

Marshall thanked two other women who stopped to help her father, one of who walked him part way home.

The Christchurch City Council and police have been notified of the attack.

The council's dog control policy says dogs must be on a short leash on all sealed paths and gravel paths within Hagley Park.

Marshall said the dog that attacked her father was on the path and was not on a lead.

In the rest of the park, dogs must be under "effective control", which means the owner or person in charge must be aware of where the dog is, what it is doing, and that the dog is not a nuisance.

Dogs are prohibited in the Botanic Gardens.