In adult horses several inflammatory conditions of the large intestine can lead to diarrhea.
The causes of diarrhea in adult horses can include poor dental care, sand-induced diarrhea, nervousness, bacteria (salmonella, Potomac Horse Fever- PHF), internal parasites, cancer/neoplasia or antibiotics.
Bad teeth, especially in older horses, may cause diarrhea. If feed is not properly ground, it will lead to irritation and inflammation of the intestine and ultimately cause diarrhea. Regular dental care along with good hay and grain often eliminates this situation.
Several different internal parasites (for instance, strongyles) cause inflammation of the large intestine which may result in diarrhea. Heavily parasitized horses will often have an unthrifty appearance and lack energy. A good rotational deworming program is preventative. De-worming is not contrindicated by his age or the diarrhea.
Continued profuse, watery diarrhea, fever (greater than 102.5 F); fetid odor of feces; blood in feces; elevated heart and respiratory rates; purple mucous membranes; colic-type signs; dehydration; cool/cold extremities or severe depression require evaluation by your veterinarian.
__________________
I hope my information is helpful. If you have more questions, just ask! I will gladly help, otherwise please click "accept".
Positive feedback and any bonus would be appreciated. Thank you, Christy
