If the reason you want to know that is a female cat drives you crazy during the spring and summer, the answer is GET HER SPAYED. Kittens only two months old who weigh only three pounds are ready for the surgery, but as long as the cat is OK with general anesthesia, it is never too late.
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.
Unless you want your dog for breeding, please get her spayed! Spaying the dog stops her from going in heat. Also if you do not, 50% of female dogs that have not had puppies and are not spayed get Pyometra, a disease of the uterus.
There is no easy way to stop dogs from sniffing each other as this is the way dogs find out information about things. A male dog does not go into heat. Only female dogs do.
Have you had them spayed?
Buy a fence.
The only way to stop your dog going into heat is to get her spayed, her heat cycles won't stop naturally.
No, male dogs can smell a female in heat from 3 to 5 miles away, the only way to stop it is to have her spayed.
A female dog will most likely stay in heat for about 21 days. 7 days coming in heat, 7 days in heat, and 7 days going out of heat. You will most likely notice some bleeding for about 7-10 days. From experience females are most receptive to males for 7-10 days after they stop bleeding.
When it is pregnant or has been desexed.
What I don't What are you even What
you just keep it indoors all the time
A female cat will typically stop being in heat once she successfully mates and becomes pregnant. If she does not mate, she will continue to cycle in and out of heat until she does. If she does not become pregnant, she may experience a rest period before going into heat again.