Iodine is important for the thyroid functions, too much or too little can have big effects.
The AAFCO guideline for Iodine is 1.5mg/kg.
http://www.merckvetmanual.com/mvm/htm/bc/tmgn46.htm
Now if you look at labels of some of the high quality foods the numbers seem to be all over the place.
One Acana formula states 2.1 mg/kg
Orijen is an incredibly low 0.18 mg/kg
Honest Kitchen Force, As Served (hydrated) 0.75
So what's the deal? I'm a little confused here..