When the temperature rises to 35°C, pigs tend to consume less feed and experience slower weight gain. To mitigate these effects, it's essential to adjust feeding strategies based on the type of pig and their physiological stage. This tailored approach helps maintain productivity and animal well-being during hot weather.
Boars should be fed twice daily, with green feed or a thinner supplement added at noon. Breeding and physical activities should take place in the cooler morning and evening hours, avoiding immediate water spraying or cold water baths after mating, as this can cause stress or health issues. From 1 to 3 p.m., misting the pigs and the floor once daily helps lower body temperature. Light exposure should be limited to 8–10 hours per day. If breeding numbers are low, reduce concentrate feed to avoid overfeeding, which may lead to poor fertility and reduced libido.
Pregnant sows should primarily be fed roughage, with appropriate balance to support both mother and developing piglets. Keep the density low, ideally 2–3 sows per pen. During late pregnancy and lactation, each sow should have her own space (1 pig per pen). Feed them three times a day, with a thinner supplement in the middle. Water should be sprayed once, and 1–1.5% baking soda along with 0.3% salt should be added to the feed. Avoid breeding during peak heat to prevent stress and complications.
During high-temperature periods, commercial pigs often show signs of reduced appetite and "inverted troughs," where they don’t eat despite being hungry. This can slow growth. If possible, sell pigs before the hot season begins. If not, reduce stocking density to ease heat stress and improve comfort.
Nursing pigs and young pigs prefer to lie on wet or cool ground, so maintaining a clean and comfortable environment is crucial. Monitor weather changes closely to prevent them from getting chilled or suffering from diarrhea. Ensuring proper ventilation and cleanliness can significantly reduce health risks during hot weather.
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