I've seen this, too.  A 19th C. Ohio farm site yielded a small, compact cache of distinctive Flint Ridge chippage, and about 20 feet away was a single flake completely smoothed on all both surfaces and edges.

I've also noted white earthenware/semi-porcelain sherds with the broken edges thoroughly rounded by water along the dripline from barn and outbuilding eaves.

In Columbiana Co. Ohio 50 years ago there was the tale of a local farmer's wife cleaning a chicken for Sunday dinner and finding a Spanish gold coin in its craw

James L. Murphy

----- Original Message -----
From: Mark Branstner <[log in to unmask]>
Date: Friday, April 28, 2006 2:08 pm
Subject: Re: Gaming disks vs. chicken stones

> Skip,
> 
> Someone else sent me this website, so I share it with you.  If 
> turkeys can swallow these, they can certainly ingest debitage ... 
> One 
> of my co-workers here also claims to have recovered debitage in 
> this 
> condition.
> 
> http://lithiccastinglab.com/gallery-
> pages/gizzardstonecahokiapoints.htm-- 
> 
> 
> Mark C. Branstner
> 
> Illinois Transportation
> Archaeological Research Program
> 209 Nuclear Physics Lab, MC-571
> 23 East Stadium Drive
> Champaign, IL 61820
> 
> Phone: 217.244.0892
> Fax: 217.244.7458
> Cell: 517.927.4556
> [log in to unmask]
> 
> "There is also an artificial aristocracy founded on wealth and birth,
> without either virtue or talents ... The artificial aristocracy is a
> mischievous ingredient in government, and provisions should be 
> made to
> prevent its ascendancy."
> 
> - Thomas Jefferson (1743-1826)
>