It’s a book written in the 1960s that was one of my favorites as a kid. It’s been adapted into a couple of films, the most recent being in the early 90s. Essentially the story of two dogs and a cat that can talk to each other traversing the Canadian wilderness to find their humans.
edit: I got to wondering about the exact dates, so here’s some links in case anyone is interested:
1961 book, The Incredible Journey