Okay hear me out. A Fluttershy that's secretly/not so secretly feral/has wild animal tendencies.
An animal growls, snarls or hisses at her and she's had enough? She'll do it Right Back.
The group has to track something/somepony down? Next thing you know Fluttershy is howling up into the air and a pack of wolves emerges from the woods in order to lend a paw.
Applejack needs help herding some cows or sheep and Winona is injured/sick/away at the moment? Here comes Fluttershy nipping at their heels and barking at them to round them up.
Somepony needs help digging a hole but they don't have any shovels? Cue Fluttershy expertly digging into the earth directly with her hooves like a mole.
Somepony needs help carrying something heavy and Applejack isn't around? There goes Fluttershy lifting up something twice her size like it was nothing, almost like she's an ant.
She. Can sleep. Anywhere. In a tree like a leopard. Upside down like a bat. Standing up like...well, a horse. Buried in the sand like a crab. In a rocky cave like a bear. Halfway in water like a seal. An. Ny. Where.
Rubs cheeks against friends and family like a cat. Will sometimes try to lick you too groom you. Will carry things around in her mouth.
Just a Fluttershy with animal tendencies that she got from constantly being around animals. And her constantly surprising/startling other ponies with them.
