Image imported from derpibooru 
Original Description:
 
My design is a bit inspired by this reddit post: https://www.reddit.com/r/mylittlepony/comments/u77lt1/doodled_fluttershy_as_a_deer_deerpony/  
Hi!  
Again-  
This is a bit of random post, but this is something I wanted to do for a long time. I just thought my skills weren’t up to the task back then.  
I’m probably gonna do more redesigns (I’m thinking of doing pinkie pie next, but how do I improve upon perfection?)  
Here’s my headcannons for Flutterdeer:  
––  
Flutterdeer was raised by a Pegasus Mom and a Deer (Stag) Dad.  
Flutterdeer doesn’t live in Cloudsdale, she actually lives in Thicket with her dad.  
Her mom doesn’t live with her dad, as pony and deer relationships were seen as taboo back then.  
Because of that, she is a very weak flier.  
Flutterdeer couldn’t connect with the other fawns since she was a pony/deer hybrid, causing her to get bullied.  
Because of this, she spent most of her time with animals since they seem to like her and she liked them back.  
She was 13 years old when the sonic rainboom happened, it played out mostly the same as canon Fluttershy, just in a different location  
Because of this, her father gave her a pet rabbit who she named “Max”.  
When her pet rabbit got sick, her father got Zecora to heal Max  
While she did heal the rabbit, the rabbit started getting bigger over the years, growing into a bunny who stands on two legs and talk.  
At age 20, Flutterdeer and Max moved to Ponyville to make some new friends that weren’t animals (Max’s words not mine), where she first met Pinkie Pie, who threw her a party in the cottage she moved in.  
Her leg was broken by Rainbow Dash, who crashed into her. She was extremely apologetic, and took her to the hosptial to get it fixed.  
After a few days, Rainbow Dash and Pinkie Pie were allowed to visit her. Flutterdeer was not at all mad though, since she only broke her leg. If there was one thing she wanted Rainbow Dash to do though, it was to teach her how to fly so she could see her mother.  
––  
I could write more but I don’t see how I could add to it (if I do, I’ll put it in a comment)