Well, the vote is in.....
Boo DEFINITELY needs a home with no other cats. He hates my cats and went after poor Moo to the point of drawing blood. It scared Moo and the scratch isn't bad (I cleaned it out with Hydrogen Peroxide). But I am not going to put any of my other cats at risk. Boo can stay here till a home can be found. Then he will be posted on Petfinder.com through HEADS (Helping Every Animal Down River Society) in the hopes he can find a pet only home. He wants to go outside so bad and yowls alot. I was so hoping this would work out, but things happen for a reason.:( I guess it was God's way of telling me that 6 is enough. I feel so bad.