How do you keep a female dog in heat away from a male complete dog in the same house?

You go to a hunter's sporting goods store that has hunter "Scents". These different type "Scents" are either used to cover up the human smell or used to lure animals in. The Scent you want to buy is used for Dog Training or to scare off other animals. The one I use is bottled by "Moccasin Joe Ambush 100% Pure Natural Urine Scents" It is called "Ambush 100% Pure Cougar Urine" I am not a sales guy for Mocassin Joe, any kind of Cougar urine will do. You could go out and collect some yourself if you want. The way you do it is to squirt some of the Cougar Urine on the butt end of your Shih Tzu. Most Scent bottles squirt. It wont hurt your Shih Tzu and it will definitly keep your Lab away from her. I use it to keep neighbors dogs, cats and other animals out of my yard by pouring 1 1/2 Oz. into a hose end sprayer and spray it around the edges of my yard property. I've seen some dogs yelp and run when they smell it. My Silvertip Wolf won't leave the yard either. The only downside to this scent, it may attract other Cougars. GET YOUR GIRL DOG SPAID!!!!!!!!!!!!!!!!!!!!!!