1) pulmonary edema-a build up of excess fluid in the interstital space between the alveoli and the capillary 2) pulmonary fibrosis-a build up of fibrous tissue in the interstital space 3) pneumonia-a build up of inflammatory fluid and cells in and around the alveoli.
The first day of bleeding is called the first day of heat. The duration of proestrus can vary from as little as 1 day to 21 days. Proestrus is a time of rising estrogen levels preparing the reproductive tract for breeding. Estrus: Is the period of receptivity. Behaviorally it begins the first day the bitch stands.
This is still within the range of normal post-delivery bleeding for a dog. It is likely that it is not even due to the birth trauma at this point, as any trauma should have stopped bleeding and started healing by now. After a dog has puppies, the uterus must heal the places where the puppys' placentas attached to it. This can be a relatively long process during which some discharge and bleeding will continue to occur. Post-delivery bleeding is considered normal until 12 weeks after the litter was born.