My neighbor mailed me some horseradish from his garden because I enjoy
> making my own. The package took a few days to get here and the roots
> were pretty hot when they arrived. They smell a little funky (but
> doesn't horseradish always smell funky?), but are still firm. I've
> had them in the fridge for a few days. How can I tell if they're > still safe to use?
Firm is good. Signs of rot (black, mushy spots) is bad. Absent any signs of bad, peel, grate, concoct, and consume!