There has been a variety of behavioural theories put forward as to why dogs engage in auto-coprophagia. This is when an animal eats its own faeces.Probably the most common misconception is that faeces eating is a sign that something is missing from the diet. Many owners feed their dogs only once per day. Dogs naturally want to have multiple meals throughout the day, hence they use ‘coprophagia’ to supplement their feeding schedule and fulfil this need.