Carlsberg stated it fed some cattle hops and two pints of Carlsberg beer a day. Supposedly the meat was very nice after this and they created the Carlsburger.
It actually sounds good! I would like a Carlsburger right now.
The idea appears to be stolen from Japanese Wagyu beef, because it is told that each cow receives a "bespoke, bi-monthly Nordic massage to ensure their meat remains tender. All this attention for the Carlsberg cattle results in a melt-in-the-mouth experience for food connisseurs.