At around 6 months of age.
Every six months on average.
No, spaying eliminates heats and is permanent. A spayed dog will never go on heat again.
That is not exactly what happens. See, unlike humans, dogs don't have crushes or anything like that. The female dog goes into heat, and the male dogs smell it and know they are supposed to mate with the girl dog. The boy dog then mates with the girl dog, and usually it is successful and they have puppies.
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.
No. Dogs don't have periods either. Does ("girl" bunnies) go into heat much differently than dogs do; they don't bleed out the vagina before they are really receptive to mating.
Dogs typically stop going into heat when they reach old age, around 7-10 years old. However, this can vary depending on the breed and individual dog. Spaying can also prevent a dog from going into heat.
Dogs typically go into heat for the first time between 6-12 months of age, but this can vary depending on the breed and size of the dog. Smaller breeds may go into heat earlier, while larger breeds may go into heat later.
The smaller breeds of dogs tend to have their first estrus cycle at an earlier age, while the large and giant breeds of dogs may not come into heat for the first time until they reach eighteen months to two years of age
I've always heard that the best time to breed your dog is the 3rd heat.
Like most dogs, probably around 8 to 9 months.
Usually dogs come into heat anytime after they are about 6 month of age, their vagina will swell quite a bit, the dog will lick herself a lot, starting with a clear fluid and then blood. If you do not want the dog to go into heat have her spayed at 6 month of age or soon after the first heat.
Puppies can go into heat anywhere between 6 and 14 months of age, my American Eskimo is 7 months old and is having her first cycle. if they have not had their first cycle by 14 months she should be taken to a veterinarian...