The Fort Worth Star-Telegram reports 44-year-old Kristen Beauregard was stung about 200 times and her boyfriend about 50 times.
Beauregard says the swarm chased them down and followed them. She says they were sweeping up piles of bees “like a bad movie.”
She says firefighters sprayed a foam substance to clear the bees, and dragged the horses to a pasture to be treated by police and paramedics.
A 6-year-old show horse died before a veterinarian arrived. A Shetland pony spent a night at a veterinary clinic but also died.
The bees are being tested to see whether they are Africanized or “killer” bees.