A fun blog post and a good question. I think you’ll find you’ve landed in a sea of folks who write animal stories for adults, and that there may be a few more books out there than you imagine. Getting the rest of the world on board is really the uphill battle, as most of us have learned one way or another, but you’re definitely in the right place.
If you’re interested in finding more books, a great place to start is the late Fred Patton’s list for the well-read furry. Link is; https://dogpatch.press/2015/09/25/the-well-read-furry/
Another would be to poke around at the books written by members of this guild.
How do we convince the traditional fiction world that we need more books about talking animals? (some might say its not as important as it used to be considering the state of the traditional world, but I think most of us would like to see a major production of a “Redwall for adults”) My best suggestion is to read furry books. Review furry books. Write about, post about, share about furry books.
Time after time when I talk about my furry stories to non-furry readers, the first reaction is surprise that this type of story exists. It’s not disinterest, it’s surprise. (then maybe a little hesitation and eventually enthusiasm) As far as I can see, the big block we have to the mainstream is awareness. The stories are out there, good stories, but how to get eyes on them … well, that’s every author’s problem regardless of genre.