Faeculent

She had several thin and faeculent stools, not like rice water, and had vomiting.

Source: wiktionary

If the fluid is faeculent it will be a yellow-brown colour and smell of faeces.

Source: wiktionary

If vomitus is thicker and foul-smelling (faeculent), a more distal obstruction is likely. This change to faeculent vomiting usually takes place gradually after about 24 hours of complete obstruction and is often an indication for urgent operation. The term faeculent vomiting is something of a misnomer as it comprises putrefying altered small bowel contents rather than faeces.

Source: wiktionary

The increase in intestinal secretions also leads to abdominal distension, reverse peristalsis and eventual vomiting of faeculent matter.

Source: wiktionary