Dogs may suffer from intermittent bouts of diarrhoea the same as humans. Diarrhoea can range from "loose" stools to explosive episodes of diarrhoea. If diarrhoea persists it may be necessary to consult a veterinarian for a proper diagnosis and treatment plan. Never give your dog over-the-counter human medication for diarrhoea, unless directed to do so by your veterinarian.
According to Pet Education, diarrhoea is defined as the rapid movement of ingested material through the intestine. This results in loose stools, an increase in the frequency of bowel movements and an increase in the amount of stools that a dog passes. Diarrhoea is considered to be intermittent if the symptoms appear, then disappear and return only a few weeks later.
In order to determine the cause of intermittent diarrhoea in dogs, veterinarians classify symptoms according to the small intestine and large intestine. Symptoms such as vomiting, increased gas and bloating, weight loss and an increase in the volume of stool may be caused by a disorder of the small intestine. Large intestine disorders often cause an increase in the frequency of bowel movements, straining to defecate and a large of amount of mucus in the stool.
The causes of diarrhoea in dogs may include a change in the dog's diet, food intolerance, parasites such as roundworms or whipworms and ingestion of toxins such as lead, zinc or arsenic. Certain viral infections such as parvovirus, distemper and coronavirus may also cause intermittent diarrhoea in dogs. Although rare, intermittent diarrhoea that presents with vomiting may be caused by a life-threatening intestinal obstruction. Dogs that suffer from this condition may need surgery to remove the obstruction.
In order to make a diagnosis a veterinarian will take a complete medical history. The onset of symptoms often gives the veterinarian a good idea of what may be causing the condition. After performing a complete physical examination, the veterinarian may order diagnostic tests such as a fecal culture, X-rays and blood tests to screen for certain diseases. He also may perform diagnostic tests such as an abdominal ultrasound or a biopsy.
The treatment for intermittent diarrhoea depends on the cause of the condition. According to Vet Info, adding fibre to the dog's diet for a few days may help firm up the stool, as will switching to a bland diet (such as boiled hamburger and rice) for a time. The vet may prescribe antibiotics for dogs that have diarrhoea as a result of a bacterial infection to avoid more serious illness (septicaemia). Dogs can experience dehydration from diarrhoea and in these cases, it may be necessary to give IV fluids for a few days instead of oral fluids.