Here are some impressions of what natural features on the rawhide can look like and how they can be caused. Such examples are caused by living outdoors through pasture boundaries such as fences or barbed wire and in rank fights or by stinging-sucking insects. Also the keeping within the playpen with use of belts can cause abrasion off the skin. Likewise, skin parasites such as mites or lice can afflict the animals and their skin. Other factors include growth, weight gain, pregnancy, illness and branding.