You are really starting out right on your animal sketches, Tkbrown82. Keep it up.
When it comes to some improvements, it could be to look up this animal animation drawing book right here
The reason why is because, it'll help you how to draw, sketch, and cartoon animals for not just animation, but also for fine art, illustration, and design.
Hope it's been completely and definitely constructive.
You are coming along nicely. Check the ears, they need a little work. Be sure you date your work so you can go back and compare your work in order they have been done. Practice makes better. Get busy practicing.
Keep practicing, your work is getting really good