This indirect use of palm oil is often overlooked in the zero-deforestation accounting process, despite its growing use, according to a report by U.S.-based advocacy group Rainforest Action Network (RAN). The report found that palm oil-based animal feed is now the single largest palm oil product category imported by the U.S., accounting for 36% of all palm oil imports into the country by weight.
archived article (Wayback Machine)
archived report from RAN (Wayback Machine)
I remember reading a few years back that about half of the total world production of palm oil goes to “livestock” feed, but I cannot find the source now.