Epigenetic studies of the dogs will be required to understand their aging. These marker molecules control transcription, but fade with time and exposure to toxins. Further, deficient epigenetic markers are often passed on to offspring. Not all dogs are created equal.

All this is easily confirmed, with a little googling. It would be a shame to miss out on such useful data.

Christian Hartleben ’92
Pittsboro, N.C.