NorCal Equine Rescue is a "501(c)(3) nonprofit charitable organization [...] dedicated to preventing cruelty to equines of all kinds: horses, ponies, mules and donkeys."
These rescuers never stop ... check out their blog or follow them on Twitter.
"A Happy Horse" Home Study Course.
A 501(c)(3) non-profit. Mission: "The rescue and rehabilitation of any horse in need. We retain horses where possible for adoption and retire older injured horses at the rescue."