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The symptoms of a dog's first heat are the same as any other heat and include swelling of the vulva and bloody vaginal discharge. Female dogs may urinate more frequently when in heat or develop other behavioral changes. Continue Reading.
Itâs important to know when your dog is coming into heat and going out of heat. There are some clear signs and some subtle clues. Pay attention to your dog and learn her behavior. This will help you understand whatâs going on when she âdoesâ come into heat. Proestrus Stage. This stage of dog heat can last from 4-20 days. The average is 7-10 days. There are 3 common signs for a dog in heat during this stage: Swollen Vulva: This is one of the best ways to