2.4. Experiment 2: rumen degradability
2.4.1. Experimental animals
Two fistulated Friesian steers fitted with large (10 cm diameter) rumen fistulas were used for determi nation of rumen degradability. The steers were 18- months-old with body weights of 426 and 437 kg, respectively. The steers were housed individually and fed on a mixed diet of NG (33.3%), L (33.3%) and SPV (33.3%) at all times. Tick and helminth control were carried out as in experiment 1.