Leading FE-tolerant shedding sheep genetics — proven, not promised.

The FE Advantage.

Romani RICHWILTs carry a long established reputation for proven FE tolerance, built on David Arvidson’s decades of dedication to FE selection in the Arvidson Wiltshire flock. Today they rank among the country's most FE-tolerant genetics: in the 2026 season, rams were dosed with sporidesmin at 0.57mg/kg live-weight or at 0.48 if from an Exlana background, with pass rates of 65% and 95% respectively.

Breeding for FE tolerance is any sheep farmer's first line of defense against its clinical and sub clinical effects. At Romani, David’s foundation work has been built on by combining it with genetics from our own flock, so FE tolerance and productivity gains go hand in hand.

With many farms seeing their summers shift from hot and dry to hot and humid, FE is becoming a growing concern across the North Island and the upper South Island alike.

Ross and Ruth first proved that FE tolerance and flock productivity could go hand in hand back in 1999, when they began crossing their own Romney composite flock with Coopworth genetics. Many clients from other breeds still come to Romani today seeking the same gains they made all those years ago.