They should always be in pairs, Male (supremacy) female (nurture) often the male is used solo for power. There needs to be a balance.
Mostly in western culture are they referred to as dogs, they are lions.
The are a beautiful creatures and have an aura about them that cant be denied. on Fu Dogs – Temple Lions placement for your home or office
I would recommend placing a chair or sofa if the space allows as this will help slow down the flow of energy in the home. I would aim for something similar to the images in this link is possible http://www.houzz.com/discussions/840476/fireplace-in-the-middle-of-the-living-room
I hope this helps, Amy.
Daniel on Feng Shui and Doors…