How many days does a dog stay in heat?

Heat usually lasts between 2-4 weeks. Early in the cycle, a female dog may not be receptive to male dogs, although some are receptive through the entire cycle. It can be shorter or longer and you'll know the cycle is over when all her vulva returns to its normal size and there's no more bleeding or discharge. read more

A female dog will generally stay in heat for about three weeks or around 21 days. However, this heat cycle will vary from one dog to the next. It depends on the breed, the age and the dog herself. read more

The average cycle for a female dog in heat happens about once every six months, typically between January and March and again between August and October, beginning when a dog reaches about 6 months old. There are four different stages for the estrus (heat) cycle. read more