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.
The Estrus Stage of the Dog Heat Cycle typically last from 5-14 days. The time your dog is fertile (her actual heat). At this stage, the discharge typically changes from red to straw colored. In many dogs, itâs still somewhat pink, but you will notice a definite difference in color from the beginning of proestrus.