Stress from boarding, holidays, moving to a new environment or separation anxiety can also lead to diarrhea in dogs. (neogreyhound.com)
The bacterial fermentation also leads to an increase in - flow of water into the intestines, which leads to diarrhea. (lesleahlusko.org)
Although some cats don't have a problem with the occasional milk treat, offering milk on a regular basis often leads to diarrhea. (catbehaviorassociates.com)