I think I did a not so bad in this animation as a whole, only the timing I think it is a little off and too fast compared to the original video. I'm sure I did a good job on making it look like it limped then got back his balance which is the starting. The first part of his first few steps was good where his knees were bent well showing it was pushed aside. The dog's upper body which represented by the rectangle polygon was well animated too where it coordinated with how his legs goes. Instead of it being stiff, it bounces well where it was low enough when the legs were bent a lot.

The first picture is a pose where it almost fell with body bent down, putting more weight on front legs.
Second picture is the final pose where it stabilized its balanced with both front legs looking strong on carrying its weight rather than looking wobbly like the first picture.

However, I think the other half end of the video is not well animated as I did not show much emphasize on the weight when he almost fell. The original video also had this little pause when he fell but I didn't manage to achieve that part as my video is too fast. 

I also think that I did not do very well for its front right leg. I realized that it did not bent as appropriately as the other legs at the stage when it is about to fall. Though it has the same duration for the original and my video, mine look very rushing for the process where it is falling and the original one look more realistic from it going to fall and get back its balance.

Problems I faced while doing this animation is during the key framing. I redo the animation quite a few times as it takes time for me to get the hang of the key framing part. I tend to mess up the key frames or did not key frame the right pose at the right timing. Then I focuses on key framing it right but did not focus on the duration of how fast pace it looked when it has been play blast. I am rather satisfied with my work, only that I could make the animation look slower paced and more realistic for the legs.