Conn. Gen. Stat. § 22-317: Cattle in transit.

The provisions of sections 22-308 to 22-316, inclusive, shall not apply to working oxen that enter the state in their daily work, or to such animals as are being transported through the state by common carriers aboard cars from any area classified by the federal government as “Free”; but none of such animals while in transit shall, if unloaded for any necessary purpose, be permitted to go beyond the care and control of such common carrier.