Slightly bulging breasts in dogs may indicate pregnancy, false pregnancy, or hormonal disorders in the body.

After a dog is pregnant, the nipples will become swollen, protruding, and discolored in about 2 to 3 weeks. It will also look pinker and tenderer than usual, and will be accompanied by symptoms such as a surge in appetite, enlarged belly, unsteady walking, lethargy, etc. Fetal movement reaction will occur around seven weeks of pregnancy. If your dog has not been mated and is feeling unwell, you can consult a doctor or go to a pet hospital for examination and treatment in time.