@callesthe: Ah, thank you! Yes, the horse is a little bit deformed, but I was doing more of a observational drawing. If I wanted to do serious animal studies (which I will) then I will take on the approach of studying their skeletal and muscle structure. Oh, that sounds like a good exercise that I could do, thank you for the suggestion. My memory takes time to remember about their structure and everything else, but the more I practice right? I'll do my best, thanks again.
@Demonfyre: That is a good tool to use in the initial phase of the sketch, but that's something over time I have to understand when incorporating both shapes and lines together. It does make my sketches too mechanical, stiff, or inorganic, which is why I use a lot of shapes in things like landscapes, building's and objects. Humans and animals are a little more tricky, but it has been done before by other artists so I will defiantly give that a shot. Seeing shapes in objects are something I am developing though. Thanks for the advice.