woop first critique c: sorry if it's terrible hahah
So I really love this!! Like actually I'm so jealous of the perf shading and highlights and such. good job!! One thing that bothers me the most is that left hind leg. The hind legs' bones should be the same length even if they are in different poses; the left hind leg's metatarsals ([link]) is really, really short and impossibly curved. This is because the entire hind leg is positioned to start too far down on the body; the upper part of that hind leg should be hidden from view by the body, making the upper part look less long and giving you more room to work with the metatarsals. Also, the hind paws are a little strange! Even though they're webbed, they aren't flat pieces of paper. You should still see that they have 3D bones, and that left hind leg's paw is like unnaturally curved xD Think about it; if you're running forward and the camera is to your right, are both of your feet going to be pointing toward the camera and down like that? It's hard to explain, but that foot should be curved the other way and not all of the toes should be visible like that. Same with the front left leg; try making it so that a few digits are blocked by the others.
Finally, the right ear (the one behind the head) seems to be placed the wrong way! I get that it's supposed to be turned like that due to the wind, but that ear is just completely backwards! How would it even connect to the head? xD try making it more pointing downwards instead of straight to the left. that's just nitpicking though, it's already great!
I just love your shading and those highlights! and the pose is just so playful and fun-looking. The expression is so cute too! You just need to work mostly on anatomy like you said but it's so pretty already! great job!
also I have no idea what those things even mean on the right because they're intended for like actual big art and this is just a style practice i guess?? they dont even work idk haha