>I'm thinking of saving eggshells to spread on the garden for the
>calcium. Any dangers I should be aware of? Does it attract critters?
I just toss eggshells on the compost pile - I have never noticed 4 footed
varmints bothering them. In Spring/Summer, the birds eat them, sometimes
larger birds haul pieces up into the trees to pick at them.
A few years ago I buried several test samples in plastic mesh bags to see
what would happen after a few months in our acid red clay soil. I buried
them about 6 inches deep in a mulched flower bed that has evergreens and
had not been amended with lime. Between June & September, when I
remembered to dig them up, the eggshells had disappeared completely, as had
a bird skeleton I had found in the woods. A cooked pork rib bone appeared
more porous than when buried, and was now hollow and clean. A raw bone
from a T-bone steak was about half gone and stark white.
I am amazed that paleontologists ever find an old bone that has been buried!