In one sentence, describe what the following article is about:

The only way to keep a male dog calm is to keep him far away from a female dog in heat, as he will not be able to control his reactions to her. Put the male dog indoors or in a kennel if a female dog in heat is going to be close by outdoors, as this can help to prevent him from smelling her scent. Do not let the male dog go for walks with a female dog in heat or play with her. If the two dogs live in the same household, place as much distance as you can between the male and the female, as the male can smell and sense the female. Shut both dogs in separate rooms as far from each other as you can manage in your home. Keep the door shut and try not to let either dog out at the same time so they are not around each other. Make sure there are no toys or items in the male’s room that belong to the female, as they will contain the female’s scent. Smelling the item can then cause the male dog to whine, moan, and scratch at the door. If you do not have many available rooms or are tight on space, you can keep the female dog indoors in one room and have the male dog live outside until the female’s heat is over. Make sure the outdoor area has a fence that will keep the male dog from venturing out of your yard.  This is only an option if the weather outside is favorable and there are no local laws or ordinances in your area that prevent keeping dogs outside. Do not keep the female dog outdoors while she is in heat, as she may try to escape to find a mate. She may also attract male dogs in the area with her scent. Though you can try your best to keep the dogs separate at home, you may not be able to control the male dog’s aggressive behavior towards the female. If this is the case, its best to board the male at an offsite location like a kennel. Keep the dog in the kennel for the female’s entire heat, which can last around 3 weeks. You may prepare the male dog for boarding in a kennel by having him stay in the kennel for short visits to get used to the environment. You can then pre-book the kennel for the male dog so he can stay there while the female is in heat.
Keep the male away from the female until she is no longer in heat. Put the dogs in separate rooms on opposite sides of your home. Keep the female indoors and the male outdoors if space is limited in your home. Board the male in a kennel until the female’s heat is over.