The organisms that cause diarrhea are mostly bacteria – Salmonella and Clostridium difficile are among the most common. Clostridium difficile is associated with antibiotic use in both people and horses.Click to see full answer. Also asked, how do you stop diarrhea in older horses?During bouts of diarrhea, give the horse Kaopectate or something similar to coat the digestive tract, and probiotics, acidophilus, or yogurt to restore normal or ‘good’ bacteria back into the digestive tract.” “Any older animal will eventually develop age-related ocular disease,” says Ursula M.Secondly, what can cause loose stools in horses? Some of the causes of diarrhea in a horse include: Behavioral, such as nervousness caused by being in a trailer or attending an event or the stress of moving to a new stable. Change of feed—either new feed the horse isn’t used to or overfeeding its regular feed. Access to lush pasture. Food sensitivity or allergy. In this regard, how do you stop a horse from having diarrhea? To treat an adult horse suffering from diarrhoea, you should: Stable the horse. Feed good hay but no lush grass, which may exacerbate the problem, and provide plenty of water. Avoid feeding concentrates and consider the use of probiotics to encourage the growth of healthy gut flora. How long can a horse have diarrhea?As far as diarrhea in the horse, some experts consider frequent, loose stool that lasts at least 7 days to be chronic, for others the cutoff is 2 weeks, and some use 1 month as the threshold. Depending on the cause, some horses with chronic diarrhea remain bright and healthy with good appetite and hydration.