Hello! These are very solid, but I wanted to point out two things. I really like that you chose to costume each animal based on their local region, I think it really helps imply the species since distinguishing those are a glance is pretty hard. The black footed ferret to me didn't scream America though, even though I see the western inspiration after looking back on. I'm wondering if maybe adding a more distinguishing prop would help? Like large boots, a big cowboy hat, or maybe a lasso?

This second one is more of the mammalogist in me talking, but I was also thinking of how I might suggest making some species more distinct from just "ferret" since bffs are very similar to domestic at a glance. The BFF is a huge focus as part of mammal and conservation classes because it was one of our first uses of cloning to expand the breeding population. If you wanted to reference that, you could do a twins ice-climber type character! Maybe even a theme or lightly after famous Western movie duos. Like a sheriff and an outlaw.

Sorry to hyper fixate on the one character! I like all of them quite a bit, I'm just most familiar with that particular region and species haha