The next to last pic give him away. I would name him Sly after seeing that look in his eye in his pen. All of ours earned their names by some trait they exhibited when they were young. Sassy got her name when she stood up to a full grown dobermand and growled to take a toy back from her. She took the toy and stood her ground, so we named her Sassy from then on.
Hally, The Olden Golden 12/5/1999-
Indi, (GSD) 8/4/2011-
Dixie, (GSD) 8/11/2011-
Sassy, (Rottie) Born 10/9/1999-6/12/2006 RIP