How long do dogs bleed while in heat?

The estrus cycle has four stages. The first stage is called proestrus. This lasts approximately 10 days and it is during this stage that your dog will bleed from the vaginal area. This is your dog's preparation for pregnancy phase, but she will not want to mate with a male during this time. read more

Your dog bleeds during the proestrus stage of its cycle, which typically lasts about seven to 10 days. You might notice that your dog urinates more and its vulva is swollen. If your dog has a heavy bleeding flow, you can visit your local pet store and purchase dog panties that have special sanitary napkins in them. read more

Most female dogs, or bitches, bleed for 18 to 24 days while they are in heat. Some bitches have their first heat as early as six months old. Healthy female dogs go into heat twice a year. read more