Page 21 of articles about management in Articles

Injecting prostaglandin F2α (PGF) or its analogues is effective for induction of farrowing, although a large range in the interval between treatment and farrowing is usual. Experience has shown that only 50% to 60% of PGF-treated sows farrow during the working day after injection and only these sows are candidates for farrowing supervision.

Until now we have spoken about the general parity structure of the herd, but in an ideal situation this optimum distribution should be put into practice in each of the productive batches of sows.

One of the main goals for a sow herd is to achieve a correct homogeneity of the productive batches.

When external administration of the hormonal product is stopped, the levels of progesterone fall.

The Danish pig producers’ research organisation has tested a number of different designs. They recommend pen dimensions of 2.7x1.8 m to accommodate modern prolific breeds.

In the first part of management of the breeding chart we basically looked at how it can help us to control returns. In this second part we will look at other applications.

With the current part you can assess your knowledge on pig welfare during the fattening phase: How much space do they need?, What is the maximum level of noise?, etc.

In this chapter we will look at how hormones can be used to influence the time of farrowing according to our needs.

Since concentrated feeds were first used it has been possible to see that mixing them with water has certain advantages. Probably the most important are a higher consumption and an improved exploitation.

The gestation unit is basically a parking unit where sows should be kept comfortable to allow the pregnancy to develop

Regardless of the causes we often waste food and the animals do not consume everything that arrives to the farm.

Space/comfort, after feeding and nourishment, is without doubt a limiting factor for the establishment of a quick, and above all, solid hierarchy.

The mating and control unit is one of the most important elements of a sow unit. Thus, it must facilitate a high pregnancy rate, high number of piglets, uniform body condition, sow longevity and a low return rate.

When the sow is pregnant, the corpus luteum remains and continues to produce progesterone. While the levels of progesterone are high the sow does not become in heat and maintains gestation.

Abortions are not always witnessed in yards or extensive systems. Evidence is provided by sudden weight loss and a vulval discharge.

So far we have seen different options for retaining the males and for stimulating the stalled sows that maximize speed and stimulus. Once stimulated, now we are going to mate them.