First, I remade Oppo's reference sheet, with some slight design changes 

Old:

New:

The main changes are the addition of thumbs, paw pads and ears, as well as changing the legs from plantigrade to digitigrade

I also added a reference for her blood and added side views too

Something that I'd like to make clear is that this is not her canon design. Oppo has no canon design apart from the original Minecraft skin. Think of all my designs of her as fanon designs, they're just one interpretation of the skin. As long as everything on the Minecraft skin is present, you can add and change whatever you want! You want to add wings? Go for it! You don't want her to have a tail? Don't give her one! The best existing example I can think of for what I mean is how lots of people draw Grian as a parrot hybrid, despite his skin not having any parrot features.

For reference, here's my Minecraft skin (which is what Oppo is based on):

This is the only canon design for Oppo, most of it is up to you.

Sorry, that was long. Anyways, I also redrew the cover I made for @Rockypotatoman1's book of life stories!

Old:

There's a lot of sizing issues here.

New:

That's all! Have an amazing day/night! Bye! :D