I know what you are going through, chin up and stay strong, missinghorsesonloan are helping me with my case at the moment (my missing arab). Keep hunting try sending posters out to last known area, website forums etc. Its keeps you busy and at least you feel like you are doing something to try and locate your horse.
Could the lady who has phoned saying she has him please contact us again or email us, we want to help Cathy be reunited with Siena, she does want to be, she cannot give her details out because of who took him, you must understand that?