This leads to narrowing, or in the most severe cases, complete obliteration of the intestinal lumen.
en.wikipedia.org The most common presenting symptom is painless rectal bleeding such as melaena-like black offensive stools, followed by intestinal obstruction, volvulus and intussusception.
en.wikipedia.org The causative agents include bezoars, foreign bodies, trauma, intestinal worms, lymphadenitis, and, most commonly, calcified fecal deposits known as appendicoliths or fecaliths.
en.wikipedia.org His tummy aches and other gastro-intestinal troubles subsided and his behaviour improved dramatically.
www.insidehalton.com Post mortem, beetles were found in large numbers in the rumen, associated with symptoms of dramatic congestion and irritation of the abomasum and haemorrhagic pseudomembranous intestinal enteritis.
en.wikipedia.org