Page 47 of articles about feed
United Kingdom - Code of Practice for Salmonella control
Effect of incremental levels of red blood cells on growth performance and carcass traits of finishing pigs
The effect of feeding crude glycerol on growth performance and nutrient digestibility in weaned pigs
Feed management after weaning
Without a doubt weaning is the most stressful process suffered by a pig, or at least it is up until that moment in its life.