Diarrhea can occur for several reasons. One of the most common causes is dietary indiscretion, where a dog eats something unsuitable, whether it's spoiled food, garbage, or a sudden change in diet. Additionally, food allergies or sensitivities can lead to gastrointestinal upset. Infections, either viral or bacterial, are other culprits. Parasitic infestations such as worms can also cause diarrhea, especially in puppies and unvaccinated dogs. Furthermore, stress and anxiety can upset a dog's digestive system, leading to loose stools.
