How Long Do Dogs Stay In Heat. Typically dogs stay on heat for 14 to 30 days. The heat cycle can be shorter or longer.
While the frequency varies with the breed and individual dogs dogs usually go into heat about twice a year or every six months. During this time they will bleed from their vagina and are fertile to male dogs. Although this can vary with each individual on average a dog will be in heat for 1 ½ to 2 weeks but this can be shorter or longer.
Like humans the heat period of dogs vary.
But if u reaLLY DONT WANT UR DOG TO GET PREGANT THAN KEEP HER AWAY FOR 3 WEEKS Most dogs are in heat for 21 days3 weeks. Typically dogs will experience heat twice a year or once every six months. Between the beginning of proestrus and the end of estrus is 19 to 21 days therefore the female dog in heat behavior that you will notice lasts approximately three weeks. From the age of six months or older most dogs will start going into heat and they will do so for the rest of their lives.