"I'd dropped my cellphone during the attack so couldn't phone anyone," she said.
She was flown to Hutt Hospital and was only now feeling able to talk to police.
Senior Sergeant Sue Leach of Dannevirke police said the dog had been put down by its owner following the attack and dog control officers had been advised of the attack.
"Anyone with concerns about dogs also need to advise the dog control officer at the Tararua District Council," Mrs Leach said.