Tyson's beef segment operating income also declined, with a $323 million loss in Q4, despite a 10.2% increase in average beef prices. Butter production is mixed in the West, as some processors say they have resumed churning, but others say they are waiting until after Thanksgiving to resume butter production. DRY PRODUCTS: Low/medium heat nonfat dry milk prices were mixed, with the range steady in the Central and East but lower in the West. The organization cited concerns over the impact of El Nino on milk production in Oceania as contributing to this increase. Industry sources in New Zealand report concerns this year's El Nino weather will have a negative impact on milk production.