I'll make it simple. Buck broadside, 20 yards away. The shot was a little high and forward. The buck ran hard for 30 yards then stopped and stood still. Was waiting for the 'wobbly legs' to start, but they didn't. The buck SLOWLY started walking off. Found the arrow...broke off....about 11" of penitration. Found descent blood where he stood, followed it for 15 yards....then decided to back out till the morning.

What do you think? Single lung?!? What do you think the slow walking away means? Thanks in advance.