Was looking for recipes for adding my own hot pepper to suet nuggets when I stumbled across this injunction to not use it. Can't find the hot pepper version of the nuggets locally anymore.

Had no idea capsaicin is harmful to bees, which would be an issue if using hot pepper sprays to deter deer.

I think I'll continue to use hot pepper suet cakes, and when I can find them, the hot pepper nuggets. I certainly have never noticed any problems with the birds avoiding them or behaving in a distressed manner while or after feeding.