After weaning, sow has lostcondition and has a negative energy balance. It should be fed on feed rich inenergy and low in protein. This practice is known as flushing.
High levels of sugar andstarch cause the secretion of digestive fluids, enzymes and hormones such asinsulin. An insulin peak stimulates the production of fertility hormones so thesow quickly gets on heat between 3- 14 days after weaning, releases largenumber of eggs thus large litter size. Iassume that you all know that nursing mothers don’t come on heat!
Feeding mother with too much protein after weaning until service (natural or Artificial insemination) has negative effect on both fertility and litter size. This is because the degraded protein causes ammonia toxicity in the body system and organs of a pig. The greatest need is energy got from starch and sugar.
The dry sow should be given 3kg of sow and weaner feed per day.
Ensure fresh water 24(7),through nipples or water troughs available all the time (always fresh water andnot a swimming pool!).
Research has proved thatadding extra sugar (dextrose 200 g/sow/day) improves fertility and litter sizein dry sows, this should be done until service date.