Oyster Shells for quail

[Coyotefur]

What is the best way to grind/crush up oyster shells for quail. The stuff you buy is too large.

Thanks

 

[21hens-incharge]

Can you put it in a ziplock freezer bag and use a mallet to break it up?

 

[pdirt]

An old coffee grinder might work for small amounts. It will wear out the grinder over time, depending how often you do this.