Puppies have been imitating since birth. In addition to imitating dog mothers in childhood, they also imitate animals that they spend day and night in daily life, such as us humans.
Through imitation, dogs can master many skills and knowledge, better adapt to human life, and win the rewards of their owners. For example, some dogs will also lie down when they see their owner lying down, some dogs will also run and jump when they see their owner jumping rope, and some dogs in European and American families will even pick up newspapers on time after the postman delivers them. These behaviors will mostly be rewarded by the owner, which will strengthen the dog's motivation to continue imitating, which is essentially a conditioned reflex.
If a dog frequently has a "praying posture" similar to this, it often indicates some symptoms, such as abdominal pain, such as stretching his front legs forward and sticking his butt out. In fact, this is the standard position for abdominal pain in pancreatitis, and it also includes the like to press your stomach against the ground or press it on a raised mat.