There are many excellent books on drawing which you can find on Amazon.comYou can also find some drawing tutorials on the internet. See the link I have provided.
Find pictures of horses that look like what you want to draw. Break the horse down into basic shapes first. Draw the leg muscles and joints with circles and ellipses, use circles and rectangles for...
The following answer is assuming that you are riding English with English tack:
Put your horse's saddle on and do the girth up on one side. Then, put the buckle of the draw reins (where you would...
Well, I've been drawing horses for awhile (I'm ten years old) and I draw better when looking at a photo--black and white helps, because then the shadow stands out and so does the shape. I suggest...