When a dog is pregnant, her nipples will be swollen and red, her belly will begin to protrude, she will be lethargic, her belly will begin to crawl, and she will be very sensitive. At this time, it also feels very strange to its owner and is afraid of harming its children. At this time, if a stranger comes close to it, it may be scared and bite, and its mood is very unstable. When sleeping, you will not choose to lie down because you are afraid of pressing the baby in your belly.