Hm, well. This was originally to help out a friend but I decided to make a quick tutorial out of it too incase anyone wanted to take a gander at it LOL.
1: Start out with a few circles and a 'back bone'
2: Add some basic lines to what you already have to form the contours of the ear, muzzle, and legs
3: Once you have all that done, VERY lightly erase it, so that you can still see it, but it's not as dark
4: Then draw the outline using the lighter skeleton/shapes&lines
5: After you have the outline just how you like it, erase the skeleton and shapes in the inside COMPLETELY.
6: Then all you do is add the details such as the nose, inside of ears, paw lines, or anything else you like
Hope it helps any ^^ Remember: This is MY way of drawing them. If you don't like it or find it doesn't help, then just go and find another way. XD Remember practice makes perfect! (: