Depends on the dog. THere are three stages in heat. The each last 3 - 7 days, so that means it last 9 - 21
In fact heat lasts ages even for ever.
As long as there are does in heat.
My dachuand was in heat for 2 weeks.
a heat wave can last a whole year in the Sahara but in most cases up to 2 months
There heat l three weeks like most dogs.
15 min
A few weeks.
Acat's heat can can last anywhere between several days and two weeks.
About 7 to 10 days.
3 weeks
On average 13-18 years.
Yes, it will last as long as there is heat in the centre of the earth.
i think it lasts forever because they keep their body heat and they are always scented