I think its a great job, however the rear left leg is a little jolty, and the tail could use more follow through/overlapping action. Also, when a horse walks, it typically goes something like this. Front right leg > back right leg > front left leg > back left leg, repeat (and usually no 2 legs are completely off the ground at the same time when walking as opposed to trotting or galloping). As for the speed of each of the legs, i'd say it was done excellently, and if this were to be moving forward it should do great. The flow on the mane is also impressive. Also you have gotten the peel very good on the walk, which is tricky for this type of cartoon horse character, However the passing action and second contact position could use just a smidge bit of work. Otherwise great job!