Diarrhea

Dogs may experience diarrhea in a stressful situation, but it isn’t accompanied by other similar symptoms, such as fever or vomiting. The explanation is that a stressed body releases adrenaline, which is a hormone that helps them cope with stress and survive a spontaneous threat, but this hormone increases heart rate and blood pressure which can lead to diarrhea.  

“Adrenaline causes a decrease in blood flow to the intestines and stomach, which can result in diarrhea in many dogs,” Brinker says.