TL;DR —
One-page reference: basic pig feeding (conceptual)
Pig diets are typically designed around life stage (weaner → grower → finisher) and production goal (growth rate, carcass quality, or reproduction). The same ingredient can be appropriate or inappropriate depending on stage, because nutrient requirements shift with body size and physiology.
Key principles
- Energy drives growth; too little slows gain, too much can push excess fat.
- Protein + amino acids (esp. lysine) support lean tissue; balance matters more than crude %.
- Fiber affects satiety and gut health; sows often tolerate/benefit from more fiber than weaners.
- Minerals & vitamins (Ca/P, salt, trace minerals) prevent deficiencies and support bone/metabolism.
- Water is non-negotiable; intake often limits performance before feed does.
Stage hints (very simplified)
- Weaners: highly digestible feed, careful protein quality, avoid abrupt changes.
- Growers: steady energy + balanced amino acids; monitor growth uniformity.
- Finishers: manage energy to control fatness; keep minerals adequate.
- Sows: adjust for gestation vs lactation; fiber can help satiety during gestation.
Safety / reality checks
- Exact rations depend on breed, environment, health status, and local ingredient quality.
- For real feeding plans: use a qualified nutritionist or validated tables for your region.