Funny you should mention that! I just got blessed with a pickup truck load of old out of date large bags of dog and pet feeds from a local farm feed supply that I do business with, that has agreed to sell my homemade bagged compost. I got about $500.00 worth of old dog/cat foods! It is so cool!
My plans is first to feed my cat and dog, the best bags. Then I plan on using it as a soil amendment/fertilizer for my lawn, a protein and bacterial food ingredient for my aerated compost tea recipes, and lastly in my hot compost piles as a nitrogen activator for hotter piles.
Most cat feeds contain fish meals. Most dog feeds contain chicken or beef meals. They all are high in protein/nitrogen, calcium, phophorus, and potassium. All meat products contain calcium phosphates.
There is a little salt in these feeds. However, I don't care, because they is about the same amount of NaCl salt in animal maures, and I use horse manure all the time in my composting schemes. It hasn't harmed my no-till garden soils yet. Compost buffers soil pH, and it buffers many mild toxins and salts in soil also.
_________________ The entire Kingdom of God can be totally explained as an Organic Garden (Mark 4:26)
William Cureton
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