* Weight and Movement: As the puppies grow, they will definitely add significant weight to the dog's abdomen. This weight will be noticeable, making the dog's belly appear larger and rounder. The puppies will also move around inside the womb, which the mother dog might feel as a fluttering or kicking sensation.
* Pressure: The growing puppies will put pressure on the dog's internal organs, particularly her bladder and intestines. This can lead to increased urination and defecation, and possibly changes in appetite and digestion.
* Hormonal Changes: Pregnancy hormones will also have a significant impact on the dog's body, causing changes in her mood, energy levels, and even her physical appearance.
Overall, it's likely that a pregnant dog will experience a combination of physical sensations, including weight, movement, pressure, and hormonal changes. These sensations will become more pronounced as the pregnancy progresses and the puppies grow larger.
It's important to note that dogs are very good at hiding their discomfort during pregnancy. They may not show signs of pain or discomfort even when experiencing significant physical changes. If you notice any unusual behavior or signs of distress in your pregnant dog, it's important to contact your veterinarian.