Old Bat Guano? Still Good??

It's been out in the weather for almost a year what do you think? I don't think it would hurt to mix it in my old dirt?

The guano may have lost some potency but i think it still contain a lot of nutrients. Go ahead and use it!

Fuck that. Buy new, better quality guano. No telling what anaerobic bacteria may have gotten to it.

Nah man I feel like its fine. What about the farmers who use horse shit they shovel that to the back of the stable for about six months then take it all out and use it ts fine same with chicken shit it sits in them chicken houses sometimes for months before it gets scraped out and used