Agriland visited Teagasc's Johnstown Castle farm to speak with farm manager, Aiden Lawless, to see how the winter milking herd is performing.
The farm, which was originally established in 2003, is currently milking 140 cows on a 70ha platform.
The farm is Teagasc's main research centre for winter milk production, therefore 90-95 of the 140 cows are calved down in the autumn for winter milk production.