Diana, thanks for the response and yes, Little Bit is spayed. And most of the dogs are female. The only males are Taggart and Jake. The other 5 dogs are female.

Isabel, thank you for the response as well. Little Bit is approx 3 years old. They get along just fine. There is never any problems between them. Taggart is such a goofy laid back dog he gets along with everyone!
Taggart never marked in the house before Little Bit got there. When my mom first told me he peed on the side of the couch I said "No he didn't! He doesn't even lift his leg when he pees!" But my niece saw him do it too. Then once when I was there he peed on the side of the recliner. Most of the time he still squats to pee or barely lifts one foot a couple inches off the ground.
Yesterday my mom and I were joking that maybe he thinks he is outside because the carpet is a light green (like grass) and the chair is brown (like a tree). LOL

I just wish there was a solution to this problem. *sigh*

Thanks again for your responses Ladies.