dustbathe

Most critically, the people who say this generally use it to justify buying the same old meat that comes from giant, wholly unnatural factory farms where animals are crammed into filthy sheds or cages and not allowed to do anything natural to them -- at all, ever (breathe fresh air, bask in the sun, raise their young, dustbathe, form social orders, etc.).

Kathy Freston: A Few More 'Inconvenient Truths' 2008

They can, however, walk, perch, dustbathe and lay their eggs in nests -- all behaviors permanently denied to hens confined in battery cages.

Time for the Egg Industry to Phase Out Battery Cages 2008