You can get these from Drs. Foster and Smith on the web for females and males.
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...........
Only if they are spayed.
if they are not female and are not fixed
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.
Like Females we have are period and female dogs also have there period every six months.But there is called heat not a period it usally last up to 3 weeks.
Depends how bad it is.
Every 6 months.