I know that the two granites that came out of that litter in June 2015 contained 3 individuals of which one was a runt. I don't know if you recall the photos I posted on that litter? But that runt almost died like two days later. He pulled through but never really showed any real growth compared to his siblings. He had a great appetite but has only in the past month shown noticeable growth in comparison to his littermates. Do you know if Darth was the runt? Sometimes with runts they hit spontaneous growth spurts and play catch up sometimes dwarfing their littermates.