Dog Aging Project demographics (IMAGE) Princeton University Caption Left) The dogs enrolled in the Dog Aging Project, known collectively as the “DAP Pack,” come from all 50 states. On this map, one dot represents five dogs. (Right) Dogs can be enrolled in the Pack at any age. This chart shows the age distribution of current DAP Pack members, stratified by size. The palest colors are the smallest dogs, under 10 pounds, and the darkest colors are the largest dogs, over 90 pounds. Credit Dog Aging Project Usage Restrictions Editorial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.