Originally Posted by Ron_L
First, Douglas Fir is a soft wood and is loaded with pitch and resin which can give the food an unpleasant taste and gunk up the cooker. I know that pine wood is used for cold smoking cured meats but it is used in small quantities. Also, soft woods burn faster and give off less heat, so you will go through more pellets than you would with a good hard wood pellet and also have more ash.
Second, did you ask what they use as a binder in the pellets? Most heating pellets use a glue of some sort to hold the pellets together. Food grade pellets do not use any binder.
Third, did you ask what they lubricate the machinery with? Machines use to make food grade pellets are lubricated with food grade oils, not machine oil.
You beat me to the punch Ron...
We can't talk you out of this if this is what you really want to do, but consider your well being and also of the others who will share this food with you.
I'm not sure of a Lumber Location near to you, but also Treager will ship 20lb bags for free at $18.00 a bag.