Fiction books with animals! Geared towards older readers?

I’ve been inspired by another post that reignited my interest!

I’m looking for fiction that includes animals, but doesn’t have to be the underlying message or theme. If it includes a strong nature/outdoors setting that would be great too, though not necessary. Nothing that feels too young-ish/child-like for example, I’ve read Peter Rabbit, Bunnicula, and Catwings, but it’s not what I’m looking for and I’m at a loss for words to describe what I desire. I prefer something along the lines of the list below:

The Black Stallion

Black Beauty

Bambi: A Life in the Woods

The Call of the Wild

Julie of the Wolves

Old Yeller

Shiloh

The Yearling

White Fang

Watership Down