Are self-cleaning "slotted" floors the answer to the waste-disposal and cleaning problems when you raise hogs in confinement? It's too early for a final answer, but here's a summary of results and developments so far.
Roth, Fred W. and Whiteker, McElwyn D.
"A Situation Report - Slotted Floors for Hogs?,"
Iowa Farm Science: Vol. 16
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol16/iss9/2