Just visited the Anna Sewell house yesterday
I watch a podcast from Normandy, France that is about a family, the Moons, that have a sanctuary for “legacy horses”. These horses were former racehorses or show horses. Some of them were minutes from slaughterhouses. They don’t limit themselves to horses. They have donkeys and lately dogs whose owners have passed away. One recent arrival was a horse covered in magots. It was heartbreaking, but they nursed this horse with immense care and kindness to bring it back to the life it deserved. The Moons’ for retired sport horses and animals on YouTube.
Maybe I'm thinking of the Black Stallion?