From Mark Griffin:
Just looked at it- there are two issues- bag size- looks like the folks got that- so the difference per pound is not that great.
Second is fat content. 5D04 has 6 percent more fat- that is fish oil. Fish oil hit an all time record last year (as did most oils) and was about $1700 a ton- fish meal was around $900-1100. So, we had some extremely expensive fish oil to get through. At one point, people thought we would run out of the world's supply of fish oil. Then, the economy started south and the commodities corrected and the Chilean salmon industry hit the skids as they are suffering through disease issues.
Now, new crop fish is just coming in and the price of oil is down below a grand a ton again, so, fish feed prices (that are fish based) have come down also.
Having said all that, a 45/16 will always be more expensive than a 45/10 as fish oil is always expensive (compared to grains).
Promise I was going to guess that.