Many things can disrupt this well-balanced system, causing diarrhea or, less frequently, constipation. Some things, like eating too much grass, are not serious at all. Others can be a sign of a life-threatening problem, such as an indigestible object (like a rock) lodged in the stomach, or a disease like cancer.
There are many reasons why a dog may develop loose stools, but most cases may be attributed to one of these 12 triggers:
1.Dietary indiscretion: Eating too much, eating garbage, or spoiled food. There�??s actually a name for it in veterinary circles�??�??garbage toxicosis�?? or �??garbage gut.�??
2.Change in diet: It may take a few days for a dog�??s digestive system to adapt to new proteins. That�??s why many dog-food manufacturers recommend that you go slow when you switch from one brand of food to another.
5.Parasites: Most of these will cause illness in puppies or in adults with weak immune systems: 1.Roundworms
6.Poisonous substances or plants
7.Swallowing an indigestible foreign body, like a toy or a dozen or more socks
8.Infections with common viruses such as: 1.Parvovirus
9.Bacterial infections, such as salmonella
10.Illnesses, such as kidney and liver disease, colitis, inflammatory bowel disease, and cancer
11.Antibiotics and other medications
12.Stress or emotional upset