We recently took a road trip to Chicago, then up to Wisconsin, and home through northern Iowa to Des Moines. In Black Earth, Wisconsin, we visited Black Earth Meats, a small slaughterhouse and processing plant that handles beef, pork, and lamb and has a small retail store.
We are talking to them about getting some Berkshire pigs, which brings us to our stop in Decorah, Iowa, at one of the farms run by Ken Kehrli, a very knowledgeable pig farmer and breeder, who raises thousands of pigs a year, some in conventional confinement facilities and some in places like the one we visited, the Holthaus Farm in Decorah, which is "Certified Humane" by Humane Farm Animal Care. This excellent operation has lots of clean bedding and indoor/outdoor space - happy pigs. The Decorah Bike Trail runs through the property, providing some entertainment for the resident horses, Holstein heifers, and pigs.

This is near the Holthaus Farm.
Some of the pigs are purebred Berkshires, while others are a mix of Berkshire, Landrace, Chester White, and Duroc. I took some wonderful pictures, but my camera died on me, so I have only a few to share.
It was a hot day and the pigs were hanging out inside, but wandering in and out the door in the back to a paddock that overlooks the bike trail.
Over lunch, we talked to Ken about some of the challenges of raising his Berkshire pigs. To start, Berkshires have small litters compared to commercial cross-breds, although they compare favorably to other purebred lines. The best Berkshire sows under optimal conditions produce average litters of 7.5 pigs 2.0 times/year, for a total of 15 pigs/sow/year, while the best commercial crossbred sows will have 13.5 pigs/litter 2.2 times/year, for a total of 29-30 pigs/sow/year. That’s less than half the production right at the start. And then the Berkshire pigs take 20 to 40 percent longer to get to slaughter weight, another significant cost to the farmer.
Another important issue is feed conversion rate, directly related to the greenhouse gas emissions results referred to in my previous post (the less efficient the feed conversion rate, the more greenhouse gas emissions per unit of meat produced). Most heritage breeds have less efficient feed conversion rates, so in confinement, for example, the best commercial crossbreds have a feed conversion rate of 2.4 to 2.6 (2.4 to 2.6 pounds of feed to get 1 pound of gain), while the best rate for purebred Berkshires in confinement is 3.2 to 3.5. Feed conversion rates are lower in outdoor conditions: 3.8 for crossbreds; 4.4 to 4.6 for Berkshires. This does not mean that confinement is better – feed conversion is only one element in the total production cycle which comprises eating quality, waste generation and air and water quality, as well as animal welfare. These feed conversion rates do not account for “external costs” such as air and water pollution and the health of the animals and the humans who share their world, all of which are burdened by CAFOs ("concentrated animal feeding operations"). The "better" rates for confinement production probably derive in part from the routine use of antibiotics in the feed as growth promotants, which contributes to the development of antibiotic resistant bacteria. This does mean, however, that outdoor production is more costly to the farmer, and to us, and therefore to the lucky person who gets to eat the delicious meats. Less meat, better meat.