She discusses her equestrian past at length in this interview:
3. She has horseperson “quirks.”
I love being around horses. I had two horses, Dan and Brumby, who hated each other and then were inseparable. I had a horse named Holly then Brandy. Her real name was Holly and then I called her Brandy for some reason.” -Seventeen
4. Her mother, Karen, owns a stable/horse camp in Louisville, Kentucky called Camp HiHo.
Horses are a very important aspect of Camp Hi Ho. Since we are located on a horse farm, in the horse capital of the world, these beautiful animals are naturally part of our camp. Our campers learn basic horsemanship from brushing, bathing, grooming and of course, riding. We have indoor and outdoor riding facilities on our property, and kids are allowed to ride horses at all camp hours.” –Camp Hi Ho website
Two Hi Ho campers
5. She’s a horse lover even on film.
In Winter’s Bone Jennifer plays an impoverished teenager living in the Ozarks, a role for which she was also nominated for Best Actress. Her character is clearly pained to give away the family horse, as they can no longer afford to feed it.