In general, a defendant can only be immune from suit in a Texas horse-related injury case if the plaintiff was a “participant in a farm animal activity or livestock show” when the injuries occurred.
Chapter 87 of the Texas Civil Practice & Remedies Code (the “Act”) was amended in 2011 to, among other things, include


As of June 17, 2011, the Texas Equine Activity Limitation of Liability Act was amended to include most common farm and livestock animals. The new Act will now be called the “Texas Farm Animal Limitation of Liability Act.”
If someone owes you money for board, training, or veterinary services, you may now be able to call your district or county attorney and have the debtor criminally charged with “theft of service”, even if the debtor has made partial payments to you. Note: this probably won’t work if you agreed to accept partial payments or