The use of by-products from the agri-food industry reduces feed costs. This study explores the nutritional value of eight potential by-products for liquid feeding.
It is difficult for a single additive to mimic the effect of the addition of antibiotics or ZnO. This is why we need to combine groups of additives in water and feed, so they act both, as prevention and treatment.
Products obtained from insects have a high proportion of crude protein: 40-44% in the case of the black soldier fly larvae, or up to 60% in the case of black fly larvae or in grasshoppers, and even reaching 70% in the case of silkworms.
In the previous paper, the effects of nutrient restriction and consequent catabolism during lactation on sow reproduction yield have been addressed. In the present paper, the efficiency of sows in using energy from feed and body mass is considered.
The study described here was designed to determine if the body tissue mobilization during lactation imposed by feed restriction could affect litter size and sow performance in the subsequent lactation.
With the restrictions on antimicrobial use as a preventive measure, a new era is born in the design of pre-weaning and grower diets. The transition to this new scenario must be approached in a comprehensive way.
Biological alterations in immune and intestinal systems occur immediately after weaning that affect subsequent pig growth and health.