The Fifteenth Amendment to the United States Constitution prohibits each government in the United States from denying a citizen the right to vote based on that citizen's race, color, or previous condition of servitude. 1  Listen to sample songs.
A rich diet fed infrequently or a sudden change to rich grass are the most common causes of gassy or spasmodic colic whereas impactions are usually caused by inactive horses on box rest and eating a straw bed. More severe forms of colic, such as a twisted or entrapped piece of intestine, are less predictable. There is not usually a clear cause and they are less likely to be caused by poor management. It was once thought that the act of a horse rolling causes the intestine to twist but that is now known to be wrong.
However, horses vary in their tolerance of pain, which can be confusing. Also, a sudden decrease in severe pain, not associated with treatment, may be an ominous sign that indicates a portion of the intestinal tract has ruptured (the relief of pressure is what causes the pain to lessen).