1. Behavioral Instinct: Dogs, particularly female dogs, have a natural maternal instinct to nurture and care for their young. Although your dog is not biologically able to have offspring, she may still exhibit these nurturing behaviors due to her innate instincts.
2. Hormones: Dogs go through hormonal changes during their reproductive cycles, which can affect their behavior. Certain hormones, like prolactin and oxytocin, are associated with maternal behavior and bonding. These hormones can sometimes be triggered even in spayed female dogs, leading to the mothering of objects.
3. Comfort and Attachment: Soft toys can provide a sense of comfort and security for your dog. They may become attached to the toy, seeing it as a substitute for a puppy or a companion. Carrying and caring for the toy fulfills their natural nurturing tendencies and creates a sense of purpose for them.
4. Play Behavior: Some dogs engage in maternal behavior as a form of play. They enjoy carrying the toy around, protecting it, and acting out roles of a mother. This can be a way for them to entertain themselves and explore their natural instincts in a playful manner.
5. Human Influence: Your reactions to your dog's behavior can also play a role in reinforcing her mothering actions. If you show excitement or affection when she displays these behaviors, it can encourage her to continue them, as she recognizes that she is getting attention and positive reinforcement from you.
It is important to remember that this behavior is normal and does not pose any harm to your dog. You can provide her with appropriate toys that are designed for nurturing behaviors, like plush toys or pet-safe blankets, to redirect her attention and support her natural instincts. You can also encourage other interactive play activities that stimulate her mind and energy, such as fetch, tug-of-war, or training sessions, to provide a well-rounded play experience for your dog.