TUESDAY TRIVIA ANSWER: Why would a veterinarian use an electrolyte solution to tube a horse that is suffering from colic? Because, it draws water into the G.I. tract. Water helps to break down fecal matter. Oil is used to lubricate matter lodged in the G.I. tract, but it does not break down fecal matter. Depending on the colic case, your doctor may tube with mineral oil, electrolytes, or Epsom salt.