Signs of heat in pigs 

• There is an intense search for the male by the female
• The female pays little attention to food
• The vulva becomes congested and swollen
• The sow emits short grunts
• It stands still when pressure is applied to the back
• There is reddening of the vulva more especially in the white breeds
• The sow can mount others and also allows others to do so.

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Dr. Bbosa Science