Dogs of most breeds go into heat on average twice a year (once every 6-8 months). This should then last for between 14 and 21 days. Primitive breeds such as the Basenji only have one heat cycle each year.
Dogs in temperate climates (where there is a distinct "winter" season) may go into seasonal anestrus at the start of winter and come out of it in late winter. Otherwise, domestic dogs go into heat approximately once every 60 days.
Virtually all breeds have two oestrus cycles each year. Initially, the vulva swells and within a day there is a clear discharge, which becomes tinged with blood the next day. This discharge increases in intensity and then slowly diminishes, ending after about ten days. During this time the female becomes more alert and urinates frequently, leaving signals of her impending willingness to mate. Ovulation takes place soon after the discharge has stopped. Only now will the female accept mating. Hormonal changes occur regardless of whether a female is pregnant, which is why there is no simple blood or urine tests to confirm impending motherhood.
Depends on the breed. The smaller breeds normally have their first heat around 6 months of age and the larger breeds normally around 8-10 months. Spay your dog if you want her to live a longer and healthier life.
Dogs come into heat at around 6 - 12 months of age. Normally the smaller breeds come in heat at around 6-7 months while the larger breeds are later in age. Outside stimulus such as another female dog in heat can bring a young female in heat sooner than normal.
Well, they go into heat their first time at the age of around one. (At least my black lab did at a year and a month).
Between the ages of six months and a year. Some may take longer though, so don't worry.
Usually between the ages of six months and a year.
Usually between six months and a year old, but it is different for each dog.
NO! it does not dogs come from wolves cats come from lions and tigers, WOW! who teaches you about animals
November 25th 2009
When a dog has a miscarriage it's expelled through the dogs vagina
It comes out November 19, 2013.
As a rule, Dogs come in 'HEAT' twice a year. They generally can have puppies after they are 1 year old, and every year after that. One litter a year usually. It is recommended that dogs don't get pregnant the first time they come in Heat.
They stay inheat for atleast 1 week if more then its normal just like haveing a period
Most dogs come from Europe or Asia
where do most pure breeds dogs come from
dogs are in the canine order.
dogs are descended from Pariah Dogs, a primitive form of feral dog.
well they come from the wolf
I think Dogs come from Wolves.
God created everything, including dogs.
The state dogs come from is unknown. No one cares if dogs came from New Jersey or Mississippi. GEEZ, WHY WOULD YOU EVEN LOOK THIS UP?!?!?!?!?!?!?!
they come from large "farms," so to speak, of dogs who are bred continuously until death.
They come from all over the world!
wolves, and coyotes