Untitled

Good job! The proportions are already pretty good.

Maybe try to make curves a bit more curvy, instead of creating a sharp edge.

Other than that, you're doing great. Thumbs up!

Most. Mindblowing Sketch. Ever, SINE. That's exceptionally quick and expressive, indeed.

But, I've got one tiny, little recommendation: Are you ready to keep up on 43 more minutes of 30-second animal poses? Would you, could you do that, pretty please???? AND, to do more poses, from 29-1 seconds, please?

The reason why is because, your next goal could be to go for the overall proportions of the entire animal kingdom. Plus furthermore, your line quality and control will become mindblowingly authentic.

Hope they've been totally and mindblowingly beneficial.

Your sketches are a nice start. You did not finish them. Go back and work on them some more - finish them.