O Gosh, Fluttershy! She's so adorable with those little phoenixes! There is even a fur on her chest! I think I should add it sometimes to my drawings, because it adds 100% cuteness to the drawing.
I guess colouring this art didn't take so much time, but the effect is very good. The drawing is more vibrant and catches an eye. Colouring sketches without creating a lineart first gives your work an interesting look. The foreground is perfect, but I think you should experiment more with the background. I'm not saying it's bad, but it's a little empty. I personally think the forest setting would be better for this drawing, as Fluttershy is feeding creatures from a forest actually. Just imagine her sitting on the grass on a meadow, in the centre of a forest, surrounded by trees and flowers.
As I look on your other drawings, you're really talented guy. There are a lot of works in your gallery, most of them are very good-quality sketches with interesting poses and well-drawn ponies. You've got a potential so please make a good use of it .