Cool!
Okay, on the first picture, I can see how the circles helped you improve. It looks good!
I like the second picture alot.
On the legs, and this goes for all the pictures, instead of making the leg larger, ((From the knee to the hoof)) make it skinnier. Also, I can't believe I'm pointing this out, but it caught my eye so I have to say something!
The line that connects the chest to the stomach, doesn't connect.
On your picture of Amythyst, very good!
I like what you did with her coat ((The spots
))
I think EH3 and I will be covering coats sometime in this class, but I'm not sure when. Probably before we do the head and facial features.