A2. Practical Piglet Weaning Systems and Digestion Physiological Background

Question 1

When is weaning?

Answer 1

Around week 4 – when piglet is btw 7-9 kg

Until day 55 (2months) Ca 20 kg

Question 2

Possible weaning systems

Answer 2

Traditional system (6w - 42kg)
Early weaning  (4w -  7-9kg)
SEW. (2w)

Question 3

Problems related to weaning stress

What to consider

Answer 3

Usuallt a BW drop, import with post weaning growth check. (trypsin remains unchanged- proteins)

Immunity, - first 2 weeks gets passive immunity

• Transient feed refusal (atrophy)
• Diarrhea (e.coli)

Question 4

Phase feeding

Answer 4

21 days or less: 4-phase (+milk replacer)
28 days or older: 3-phase

Milk replacer –> CP 25-26%
Prestarter –> 20-21%
+ additiatves + organis acidis –> help dec pH

Question 5

Feed program; begin at 3 weeks or earlier

Answer 5

1) Milk replacers. (CP25%)
2) Pre –> day 11. (CP 21%)
3) Starter –> day 42 (13-15kg) (w5) (CP 18%)
4) Grower–> 70 (20-25kg) (w 12) (CP 14%)

Question 6

Feed supplements

Answer 6

Milk replacer (have to be 25% CP)
Organic acids to mage pH more acidic
Essential AA (lysine)  ca 13%
Nutrient and minerals to cover the energy need
Ca: P  -->  10:7. g/kg

Question 7

Others agains ecoli

Answer 7

Less digestible fiber

Feaces from boar

Question 8

Digestion physio

• CH
  (undigested starch cause dysbacteriosis and osmotic diarrhoea)

Fat

Protein

Answer 8

Lactose produces lactic acid –> prevnt HCL, keeping the stomach not so acidis.
Not able to digest CH before week 3-4 (amylase)
Sacharase and maltase inactive until week 6-8
HCl secretion) starts on the 5th weeks
0-10day pH 5,2–5,3
Lactobacillli colonizing, produce lactic acid, pH 3,5–5,0

Rennin (chymosin): main enzyme till the 3-4 weeks of age
pH 7-7,4