Usually between six months and a year old, but it is different for each dog.
They can be bred when they have their first heat cycle which can be as early as four months but is more typically around six months. It is generally not recommended to breed a dog on it's first heat.
Female dogs go into heat when they think of mating, they get excited, then the male dogs will mate with them... however a male dog can make a female one to go into heat by licking the dog's vulva with their tongues...........
well mine is 8 months and she still hasent..she should anytime soon.
Only if they are spayed.
if they are not female and are not fixed
There is no reason to give a female dog medications for a first heat. Having a heat cycle is a normal thing for a female dog. If you are not going to breed her, then have her spayed as soon as she is out of heat. She will live a longer and healthier life. Cut down her risks of mammary tumors, uterine infections, perianal tumors, etc.
I have a female Newfoundland and she just went into heat right at 6 months old.
Female dogs heat usually lasts 3 weeks.
No they do not the female dog has to be in heat
If they aren't neutered, yes.
they have periods but then it is called going into heat
No, only female dogs can go into heat. Males can mate at any time of the year.