Table 1 in this document (https://attra.ncat.org/attra-pub/manures.html) gives an analysis of various herbivore manures. I've always read that chicken manure is considered "hot" and must be composted before use on edible plants, whereas rabbit manure can be used directly, without composting.
After examining Table 1, I'm forced to conclude that other factors must be in play as well, because rabbit manure is analyzed (albeit with caveats about variability due to diet and other conditions pertaining to the animals) as higher in all three--NPK--major nutrients than chicken manure. Maybe it's the...hmm
... "liquid" nature of bird waste vs. the "solid" nature of rabbit waste which produces the warnings?
At long last, I've had some access--although limited--to chicken waste for my compost. These rescued chickens are free-ranging bug eaters who also receive supplemental food from their keeper. The waste has been a few weeks old when I've received it (5-gallon bucket) and, although there has been a noticeable ammonia odor, it hasn't been the knock 'em dead
odor I had been led to expect. *relief*
Gotta turn that compost soon and see what kinds of treasures await my plants! The BioStack bin has "eaten" the ingredients much more quickly these past few months, when I've had access to the chicken manure, than previously.
Sunset Zone 17, USDA Zone 9