Not exactly. While it may draw some inspiration from true animal stories, it's mostly a fictional creation that incorporates common themes and scenarios found in real-life animal adventures.
The main characters are the animals that go on the journey. There are usually a dog, a cat, and a young animal, perhaps a bear cub or something similar.
The main themes in 'the incredible journey novel' include perseverance. The animals keep going despite all the difficulties they face, like harsh weather and lack of food. Additionally, the theme of nature's power is there. They are at the mercy of nature and have to navigate through its various elements.
I'm not sure which specific 'incredible full story' you are referring to. There are so many incredible stories in the world, like the story of Helen Keller who overcame blindness and deafness to become an inspiring figure. Or the story of the Apollo 11 moon landing which was an incredible feat for humanity.
Since it's about an incredible journey, the main characters are likely to be the animals that brave this journey. They could be different species like a dog, a cat perhaps, or other animals that are known for their survival instincts and ability to travel long distances. However, without reading the story in detail, we can't be certain about the specific identities of these main characters.