casting
...that casting is the regurgitation of fur, feathers, and other undigestible material by hawks, to clean and empty their crops?
...that <b id="mwCOc"><a class="mw-redirect" href="./Casting_(falconry)" id="mwCOg" rel="mw:WikiLink" title="Casting (falconry)">casting</a></b> is the regurgitation of fur, feathers, and other <a href="./Digestion" id="mwCOk" rel="mw:WikiLink" title="Digestion">undigestible</a> material by <a href="./Hawk" id="mwCOo" rel="mw:WikiLink" title="Hawk">hawks</a>, to clean and empty their <a href="./Crop_(anatomy)" id="mwCOs" rel="mw:WikiLink" title="Crop (anatomy)">crops</a>?