Although pigs’ milk is high in fat (around 8.5% compared to cows milk at 3.9%) and is an excellent source of nutrients, sows are very difficult to milk. They have around 14 teats compared to a cow’s four, and they don’t take very kindly to having them touched by humans. They also get very agitated if you try to restrain them. Pigs also have a limited milk ejection time of around 15 seconds, whereas a cow’s can be up to 10 minutes.
(
gronkpan https://twitter.com/VomitingLarry,
Thu 21 May 2015, 8:12,
archived)