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. 2009 May 15:702–738. doi: 10.1016/B0-72-160422-6/50071-1

Table 69-1.

SMALL BOWEL VERSUS LARGE BOWEL DIARRHEA

Observation Small Intestine Large Intestine
Frequency of defecation Normal to slightly increased Very increased
Fecal output Large volumes Small volumes frequently
Urgency or tenesmus Absent Present
Dyschezia Absent Present with rectal disease
Mucus in feces Absent Present
Exudate (WBC) in feces Absent Present sometimes
Hematochezia (red blood) Rare Frequent
Melena (digested blood) Present sometimes Absent
Steatorrhea Present sometimes Absent
Flatulence and borborygmus Present sometimes Absent
Weight loss Present sometimes Rare
Vomiting Present sometimes in dogs; frequent in cats Occasional

WBC, white blood cells.