Cool list! I love games where you play as non-humans and I will have to look through this list for new games to play. Here are some more games you could add:
Adapt
Alpaca Stacka
Anarcute
Astronomical Club for Queers
Beetle Uprising
The Big Catch
Billie Bust Up
Bug Fables
Bugsnax
Bunni: How We First Met
Button City
Cat Goes Fishing
Cat Quest
Cattails
Chicory: A Colorful Tale
Crab Champions
De Blob
Dino Nest
Disney's Bolt
The Dog Island
Domestic Dog Simulator
DreamWorks Dragons: Legends of the Nine Realms (this game is not the first in the series, but the previous game has you play as a human while this one doesn't)
Duck Life
The Elephant Collection
Epic Mickey
Escape Goat
Feeding Frenzy
Flewfie's Adventure
Flying Neko Delivery
Fugl
Furcadia
Grow Home
Hamster Ball
Home Free
Impressive Title
KarmaZoo
Kingsley's Adventure
Kitaria Fables
Kukoos: Lost Pets
Lif
Littlest Pet Shop
Lucky's Tale
Lunistice
Manitas Kitchen
Mimpi
Mirth Island
MouseBot: Escape from CatLab
Mythic Ocean
Nyan Cat: Lost in Space
Petit Island
Petz Catz 2
Petz Dogz 2
Pizza Possum
PokePark
Pumpkin Jack
The Punchuin
Pupperazzi (a mostly first person photography game where you play as a camera with legs)
Rabbids Go Home
Sausage Sports Club
Sea Monsters: A Prehistoric Adventure
Seal World
A Short Hike
Skator Gator
Skye Tales
Smushi Come Home
Snaccoon
The Spirit and the Mouse
Stick to the Plan
StrikeForce Kitty
Super Lesbian Animal RPG
Them's Fightin' Herds
Toem
Tracks of Thought
Urbanix
Very Very Valet
Wood & Weather
Woven

@Latch Wow wow thank you! I'll add these next chance I get :D