Thank you all so much! 
I moved all of the furniture against the walls in our living room and set up the backdrop in front of the fireplace. I had one umbrella set up with a flash on the left corner of the backdrop and another in a soft-box. I also had a flash on my camera (all of these are Canon, two 580EXII's, and one 580EX) with a Gary Fong Lightsphere, and pointed it to the ceiling to bounce.
The backdrop was white, but I know I'm still doing something wrong because it is grey-ish in the pictures. I was going to blow it out in photoshop but I actually liked the way it looked, so I kept it.
This picture was a test I did to see if the flashes were working and it somewhat shows the setup. I had a white blanket on top of the backdrop because I didn't want the dogs shedding all over it and getting it dirty.
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You can sort-of see the umrella on the left, and the soft-box on the right. I shot them with the 24-70L.