October 2016 - as Rooney aged, his ribcage widened. This affected his stance, causing him to stand with his front legs spread further than normal at times. His elbows would also point outward (not to the degree of say a Bulldog, but not neatly straight with his shoulders).
Natural/self-stack - March 2017
January 2011 - compared to the self-stack photo from March 2017, his structure improved. Lost most of the sway in his back and had a dip behind his withers in the topline instead. I'd say his forearms grew a bit to balance out his high rear (but photo angle + the fact he's standing under himself factor in to this possible illusion). He was a premature neuter, so there's no telling how much of an impact that made on his overall structure.
Rooney and his first bud, Scamp - 2014
Rooney and his second bud, Canon - 2018. Canon's Embark profile: embk.me/canon3