20 years ago we inseminated gilts when too small, then we inseminated them when too heavy, and now we are returning to an intermediate weight.
The most productive farms are not always the best. We must also bear in mind the weaned piglet's weight and the sow's feed intake.
Achieving a high prolificacy and knowing how to take advantage of it (transform it into weaned piglets) is vital for the productivity of a sow farm.
It is common to see that there are many farms on which the gestation of the sows entered in the farrowing quarters is not correctly managed. How much space / batch would be losing a farm that enters systematically a 10% of sows / batch one week before than the appropriate date?
Knowing how to make the most of space in our farrowing rooms is a key point, not only when using foster sows, but also for increasing the age at weaning. The farrowing pen is the most expensive pen at the farm, and we must obtain the maximum possible efficiency out of it.
In the previous piece of advice we saw that obtaining foster sows by moving piglets "forward" had some disadvantages, which are solved by moving the sows "backwards".
When using nurse sows (foster sows) whilst making some piglets "go forwards" before the expected time we end up weaning them one week before. This poses certain problems.
As of the 3rd-4th day of lactation it is not recommendable anymore to replace small piglets and piglets with poor a growth rate for good piglets, because it is probable that the teat that has to be used has already dried off due to the scarce stimulation received for several consecutive days.