Actually it was answered several times.....it is safe.No one answers if coffee grounds are really safe.
These grounds are 'spent', already used to make coffee to drink, so the caffeine is gone.Will my chickens be hyper from caffeine or does it dissipate with time?
Please post a link to this article?This post is from an article on this site:
1. Caffeine
Drinking brewed coffee or tea is not the same as nibbling a few spent grounds.