While the exact reason is unknown, there are several theories that attempt to explain this behavior. One theory suggests that Shih Tzu dogs align themselves with the Earth’s magnetic field before defecating. A study found that dogs are sensitive to variations in the Earth’s magnetic field and prefer to align their bodies along the north-south axis.
Another explanation is that dogs may circle to find a comfortable position, ensure their surroundings are safe, or spread their scent by releasing smell markers while defecating. The behavior may also be linked to the evolutionary behavior of wild canids, who assume a defensive position before resting.
Furthermore, the circling behavior may be attributed to a nesting instinct, where dogs create a comfortable spot to sleep. Dogs may also circle to mark their territory and establish their place within the pack. The story concludes that while the exact reason for the circling behavior remains uncertain, it is a normal instinctual behavior for dogs and is nothing to be concerned about.
The article also mentions various other topics related to Shih Tzu dogs, such as their understanding of human words and tips for saving money as a Shih Tzu owner.