6 months
Yes. All female mammals have periods.
no her 3rd
Yes.
until the female has giving birth
A female dog has one vagina. It is between her hind legs and below the anus.
Yes as long as the larger dog is the female
As long as it is not a female dog it is. Male dogs are called "Dogs". Female dogs are called "Bitches". See the related questions "What is a dog when it's not a dog?" and "Is my dog a dog?" for more information on these interesting questions.
Some can, but not for long periods of time or distance.
Yes as long as the male dog is not fixed
The average weight of a female Akita (adult) should be between 75-110lbs
Dogs don't have periods - they have estrus cycles. Severe malnutrition can cause a female dog to go into temporary anestrus where she won't cycle or be fertile until her body condition improves.
Yes. This is referred to as " heat " or "in season " . This is the time to mate your female if you want pups, or keep her in seclusion if you don't want her bred. There are sanitary products for dogs at any pet shop or supply store.