The horse − which was put down by a vet at the scene of the accident − was reportedly one of six being exercised by the local hunt.
No one was injured in the accident.
A spokeswoman for Tesco told FoodManufacture.co.uk: “We were sorry to hear about this sad accident. Our driver acted responsibly throughout and we are in contact with the owner.”
Meanwhile, earlier this week, Tesco withdrew its Everyday Value spaghetti Bolognese, after samples were found to contain 60% horse meat.
Since the horse meat crisis began last month, Tesco has withdrawn up to 10M burgers from sale.