There is nothing so disconcerting to a farmer or veterinarian on a pig farm as the sudden death of their breeding sows.
On the one hand, these are animals in which a large amount of money has been invested, and on the other, a high mortality rate increases the replacement rate and therefore the percentage of gilts, with the consequent risk of the appearance of pathological processes as a result of the destabilisation of the herd (low fertility, neonatal diarrhoea, outbreaks of PRRS, …)