All groups were housed in slatted(slat width 10.16 cm,gap width ranging from 1.91 to 3.81 cm)concrete pens,where SLAT and SOLID had the addition of textured rubber flooring.The SLAT mat covered the entire pen floor and consisted of interlocking rubber sheets that were secured with metal hardware,whereas SOLID was one complete sheet of rubber that was located directly behind the concrete feed bunk and opposite the automatic waterer