Hey Chomperrules, It's cool to see other people showing off their art.

Speaking of honesty, I have to admit that I'm a little annoyed with Dalekdino's response. While criticism can be a helpful tool, not explaining why something is bad or how to improve adds nothing except for the possible future deterrent of the artist in question.
Now to the topic at hand. I might have a few tips that could be helpful. I'm still at a point where almost all of my drawings are taken directly from scenes in the movie for reference. I feel like this is the best way to get practice when starting out. Next time try googling a character and redrawing the pose as best as possible (and don't just trace the image as you won't see any mistakes you're making).
It's also best to try and break it down into simple shapes at the beginning. Littlefoot for example can initially be drawn like so:

I started with drawing a circle for the main body, a couple more for the legs and feet, a simple triangle for the tail and finally two lines for the neck with a smaller circle for the head. This rough work at the start can help reduce proportionality problems as you move along.
From here you can start to make adjustments to the final product. For this one I erased lines where the shapes connect:

The one thing I want to point out with your drawings is how you draw your legs. A quadruped wouldn't have it's 4 legs evenly spaced out throughout it's body. It has 2 in front and 2 at the back. I included the other 2 legs in this stage as well, slightly offsetting them and shortening them to help give the appearance that they are more towards the background. Now that I'm satisfied with that, I start to put in the more fine details.

For the spine I use half circles, making sure that the top part of the circles are above the line I used for his back. Next I added in a wavy line for the top part of his back that is darker in colour and a line for his underbelly which is lighter in colour. I finished with some face detail (Drawing faces for me is one of the hardest parts and requires a good amount of practice and familiarity so don't be discouraged if you have difficulties on that part).
This is what helps for me anyways so I hope some of that can help you in some way. Good luck!
