DEAR DR. FOX: In case you need it, this is just to commend your speaking out about what’s wrong with this world, the environment, animal health and public health. -- C.H., Naples, FloridaDEAR DR. FOX: I never paid attention to your column until I happened to notice your connecting animal advice to environmental issues. There were obvious genetic issues at the root of his joint problems, and likely his cancer. Do you have any recommendations on who I could contact (at AKC or otherwise) to try to prevent any future litters that may be impacted by the genetic issues my Rex experienced? (Send all mail to email@example.com or to Dr. Michael Fox in care of Andrews McMeel Syndication, 1130 Walnut St., Kansas City, MO 64106.