If your dog has persistent constipation or diarrhoea that lasts for longer than 48 hours or there are any differences in the poo such as the presence of blood or mucus, it is recommended to visit your vet and, if possible, take a fresh stool sample with you.

Withholding food for 12 to 24 hours, and providing water in small amounts frequently, can clear the cause of the upset and allow the gastrointestinal tract to settle. It’s usually the first line of attack for diarrhoea. Before you decide on a fast, be sure that your dog is healthy enough to endure it. Puppies, and elderly dogs, for example, need nutrients.

Also, a fast may not be appropriate for small dogs who do not have the physical reserves of their larger cousins. Diarrhoea can lead to dehydration, so make sure to give your dog access to water at all times. You may also offer unflavored Pedialyte to help maintain electrolyte balance under a vet’s advice.