Roger Lyons long ago worked side-by-side with Bill Oppenheim at Racing Update, in the development of Bill’s “APEX” ratings. He also worked with the late Jack Werk on the development of the Werk Nick Rating for WTC, Inc., of which I’m president. At WTC, Roger has developed several tools for pedigree analysis, and he’s always fritzing around with numbers and pedigrees. His latest post at his blog Pedigree Matters is an interesting piece about female families, and as usual, he’s boiled it down to numbers. Click here to see the Top 40 dam lines, according to Roger, and click here to read Roger’s post for more detailed information on how the figures work.