Uncooperative Characters by Leann Harris

I'm working on the next book in my "Rodeo Heroes Series". I know the heroine, Kai Delong. She is the younger sister of the the heroine of my last book. Kai just finished her degree at the University of New Mexico. I know the hero, and where the book is set. It's back in Peaster, Texas, west of Fort Worth. I know the hero has a sister, but none of those folks are talking to me. They're closed mouth. Won't share anything. Both the hero and heroine are second children. (I believe in birth order.) Now I know the horse that is featured in the book that brings the hero and heroine together. The dog that the sister has (therapy dog) happily wags his tail and is willing to lick my face, but that's it.

I am not a pantser, but with this book I plan to sit down and write the first three chapters. I don't like doing it this way, but the same thing happened with my last book. Rats.