From Miss Jeans:

I had read too, about composting the manure 6-8 months prior to using. A couple of years ago I used a bagged "composted" manure that was obviously not aged, nor composted. I grew up on a farm and I KNOW the difference! The product was not only gummy, but it smelled. A dead giveaway. I did not use it in the veggie garden, but threw it in one of the flower beds and tilled it in.