At 12:34 PM 12/11/00 -0900, you wrote: >Hi Gina, > >I'm not sure what book the question is in reference to? Is it GYDAB? both >this and the GYPWB can be had at http://www.dogwise.com No it was a link to a web site we all saw on another list that talks about HD being environmental not genetic. I will look further... G :-)