your welcome! I've only found good bear anatomy reference in one place, and luckily I was able to hunt it down for this assignment. That's one of the main reasons I leave this chart up as reference for everyone.
Honestly, you just got to draw more. I've reached the point where I don't go a day without drawing, and have been that way since February. The rate of improvement since doing this is ridiculous in the best possible way. Looking at your work specifically, you need to draw more from life. If you can't find a model (check out community colleges) or can't go to a zoo, DA has a ton of stock images that you can use as reference. Starting is the hardest part, but once you've built up that momentum, our golden. Also, don't worry about the drawings being bad. I still draw bad drawings, I just don't post those ones.