From summer 2012, speaking about this study before publication:

http://ec.libsyn.com/p/e/a/7/ea7e591851320f2a/AKC_Podcast_Dr._Ben_Hart_7-5-12.mp3?d13a76d516d9dec20c3d276ce028ed5089ab1ce3dae902ea1d01ce873fd8c85867c2&c_id=4909387

People are going to neuter and spay. I would like to see a study that shows a reduction in cancers and orthopedic issues correlated with when the animals are neutered. . . ie would you see a 10% reduction if you wait until the animal is a year, a 15% reduction if you wait until he is two. That would be a good guide.