The integration of Kitteh situation is going well. Kitteh is hardly ever afriad of Belle anymore, it only happens if Belle rushes up on her with all 55 pounds, and then Kitteh gets scared and runs away. Other than those times, they are starting to play together, Belle nudges Kitteh with her nose (like she does when she's playing with other dogs), and gives her kisses all the time.
I think Belle's over-attention towards Kitteh actually can annoy her at times, but mostly, she plays back also. She turns over on her back and bats at Belle with her paws (without her claws, of course), and rolls around. She seems more comfortable playing with Belle when she's on her level, which means, when Kitteh is on the couch. I can understand this, I'm sure it's intimidating to try to interact with a large dog when you're a tiny little 5 pound cat.
Anyway, we are very pleased with the progress so far. Kitteh has only been in the house a week and she and Belle seem to be becoming friends. I hope that eventually, they will be very happy together.
We still haven't officially named Kitteh, however, Mark has decided that we should call her "Cheesy Tot", why, I don't know, but I think not.