There is a study being run by an excellent group at the U of M Vet school that is looking for healthy large breed dogs over the age of 4 1/2 to serve as the control/reference group in a study of cancer in dogs. Read more here: https://www.akcchf.org/research/participate-in-research/AKC-CHF-03032-MOU-Study-Announcement.pdf Some years ago we supported another one of Dr Modiano's projects. -- Chris Plum 28 MacIntosh Lane Wappingers Falls, NY 12590 845-632-1652