Pyometra is divided into open and closed pyometra. Symptoms of closed pyometra: There will be no purulent secretions from the dog's vulva, larger abdominal circumference, faster heartbeat, decreased appetite, increased water consumption, excessive urine, and in severe cases, difficulty breathing. Symptoms of open pyometra: A small amount of purulent secretion is discharged from the dog's vulva from time to time, which is gray or reddish-brown in color, has a bad smell, is red and swollen in the vulva, has an enlarged abdominal circumference, has decreased appetite, and has excessive urine.