Hmm... some pointers on how to improve these, perhaps:
Bodies seem a bit too... consistent(?), I'd make the bodies slightly thinner when they come to the back legs.
Dashie's tail seems a bit too big while Fluttershys' seems a bit too small.
Dashie's wings are too close to her neck in my opinion, I'd suggest moving them back a little.
Fluttershy's wings seem a bit too big.
Overall, they're pretty good for a first attempt. Just need some polishing and then they'd be good to go!