As roughage, fresh clover grass was used in the two summer replicates except in the final period of the
second replicate, where grass silage was used. In the two winter replicates, the pigs were fed grass silage.
The roughage was given ad libitum from a hedge placed on an outdoor area for both treatments. In all
replicates the pigs were fed a concentrate mixture based mainly on cereal grains and soybean meal,
minerals and vitamins in an indoor feeding trough twice a day. One of the treatments was fed “High”
amount of concentrate (100 percent) and the other treatment “Low” amount of concentrate (70
percent). The relative levels of concentrate feeding refer to a scale based on time span from start of
treatment at approximately 25 kg live weight. The pigs were slaughtered at approximately 100 kg live
weight.