This is a really excellent piece of writing. To say that I enjoyed it would be something of a misnomer - and a disservice to Dolores' creepiness! - but I certainly felt enthralled and unnerved by the story.
As you say in your notes, the cats are a great counterbalance to the Dark themes. I loved the fact that they all had different personalities, and clubbed together to protect Arabella when she needed it.