Regardless of what animal you are going to use a knife on, I think it's important to understand anatomy in detail, in order to cut in a way that doesn't dull your knife prematurely. This may also include knowledge about [arts of the hair with more dirt in it than other parts, for example. I see a lot of people who have a sharp knife that gets very dull after trying to get through a few joints because they saw away, rather than find just the right spot.
Of course, it comes with experience, but it also pays to carry a small stone or steel in the bush as well, I reckon. I carry a smooth steel that a friend made for me (it's very small) and a Fallkniven DC4. I rarely need to use them in the middle of dressing out an animal, but I may use them back at camp between dressing out animals on different hunts.