A rectal examination of a colicky foal reveals no abnormalities. Which conditions does this finding help to rule out?

• A. Meconium impaction and colonic atresia
• B. Intussusception
• C. Gastric ulcers
• D. Septicemia

Answer: (A)

A rectal examination in a foal is used to check for hindgut mechanical problems such as blockages or abnormal bowel looping. When this exam is normal, it makes large hindgut obstructions unlikely. Meconium impaction and colonic atresia are such hindgut issues that typically produce palpable abnormalities in the rectum or colon, like a firm fecal mass or distended loops. So not finding anything abnormal on the rectal exam argues against these conditions.

Other possibilities like intussusception, gastric ulcers, or septicemia aren’t as reliably ruled in or out by a rectal feel alone. Intussusception might occasionally be suggested by rectal findings, but a normal exam doesn’t completely exclude it, and gastric ulcers or septicemia require other signs and tests beyond the rectal palpation.