On the third week of his trek along South Africa's perimeter, 50-year-old Russell Kearney's boots wore out.

So he put on his spare pair and continued walking.

"This walk is inspired by faith and I am a survivor, so I will complete it," he said in Durban yesterday.

Kearney, a cancer survivor, and his dog, Kei, embarked on their 6000km journey from Port Elizabeth in February.

"We have endured the rugged terrain and survived harsh weather conditions in the Wild Coast area.

"We were also bitten quite badly by pepper ticks. We arrived in Durban to find the weather warmer but having done this walk before, I am prepared for all types of weather," he said.

In 2011, Kearney walked from Namibia to Mozambique for charity.

This time his journey is being documented to feature in his autobiography.

Fifty percent of the book sales will to go to Port Elizabeth's Animal Welfare Society and Birds of Paradise.

"What makes this time unique, is Kei. He is also a survivor as he escaped death at birth, and two months later when he had Parvo disease.

"It's amazing to see that he seems to be enjoying this walk.

"He is friendly to people and animals that we meet along the way," he said.

Kearney walks an average of 20km a day.

"The people of South Africa are amazing. I have stayed at hotels, bed and breakfasts, backpackers' lodges and private homes. I have also slept on the beach.

"People are really welcoming and accommodating. Most places usually won't allow a dog yet they have allowed Kei," he said.

From Durban he is heading off to Umhlanga, then Ballito and onwards.

"Walking along the coastline, I have experienced the beauty of sunrises and sunsets.

"This walk is allowing me to experience our beautiful country from a different perspective."

Kearney has given himself a year to complete the walk.