Yes, "Homeward Bound: The Incredible Journey" is based on the novel "The Incredible Journey" by Sheila Burnford. The film, released in 1993, follows the adventures of two dogs, Shadow and Chance, and a cat named Sassy as they embark on a journey to reunite with their owners. While the movie takes some creative liberties, it retains the core theme of loyalty and the bond between pets and their families, similar to the original story.

Yes, there is a sequel titled "Homeward Bound II: Lost in San Francisco," released in 1996. In this film, the same animal characters—Shadow, Chance, and Sassy—become separated from their family while on a trip to San Francisco. The trio embarks on another adventure, navigating the city and facing various challenges as they try to reunite with their owners. While it received mixed reviews, it continues the heartwarming theme of friendship and loyalty found in the original film.

"Homeward Bound: The Incredible Journey" is generally considered appropriate for 5-year-olds. The film features heartwarming themes of friendship, loyalty, and perseverance as two dogs and a cat embark on an adventure to find their owners. While there are some mild moments of tension and danger, they are not overly frightening. The movie teaches valuable lessons about family and bravery, making it suitable for young children. Parents might want to watch it together with their kids to discuss any emotional moments.

As of October 2023, "Homeward Bound: The Incredible Journey" is available for streaming on Disney+. You can also rent or purchase the movie on platforms like Amazon Prime Video, Apple TV, Google Play Movies, and Vudu. Availability may vary by region, so it's a good idea to check your local listings or streaming services for the most accurate information.