If I remember correctly, about 30 years ago, Hoffman indeed manufactured a dehydrated cow manure and it was sold at almost every garden center. It was absolutely dry and had a strong odor. I remember observing an interesting result on tomato seedlings with this manure and, now, I wanted to confirm my observation in a controlled experiment. I don't want to use composted manure because the amount and type of compost material is an unknown variable.
I recently ordered this:
https://www.etsy.com/listing/4938310...=sr_gallery_46
but haven't received it yet.
Incidentally, I have seen similar false advertising by sellers before. About 6 years ago, grocery stores sold Lowell Pomegranate Juice for about $2.50 per 1 liter bottle. It was pure and high quality. Then Lowell stopped manufacturing it and replaced it with "Pomegranate Juice Drink" which contained 40% carrot juice. But, all of the grocery stores continued to advertise it as "Pomegranate Juice."