*'''CAREFUL''' digital examination ''per rectum'' (for diagnosis only)
*'''CAREFUL''' digital examination ''per rectum'' (for diagnosis only)
*Abdominal palpation (meconium may be palpable if abdominal tympany is not too advanced)
*Abdominal palpation (meconium may be palpable if abdominal tympany is not too advanced)
*Abdominal ultrasound
*Abdominal ultrasound
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*Abdominal radiography
+
*Abdominal radiography of faecal masses in the colon<ref>Edwards, G.B (1997) Diseases and surgery of the small colon. ''Vet Clin N Am: Equine Pract'', 13:359-375. In: </ref>
−
Diagnosis is based on clinical signs and detection of a firm
−
mass upon digital rectal, lack of passage of milk stool and
−
abdominal palpation or radiography of faecal masses in the