I was curious to see what some thoughts were. My question is why some shots I would have expected to be pass through shots don't and others that shouldn't do. A few years ago I hit a doe too far forward and it busted through both shoulders and then stuck in thw ground. Last night when I shot my buck I hit it right above the heart and it lodged against the far shoulder joint. (Slightly quartering away). If they are alert do they slow the arrow down? Nothing has changed on my setup that I shoot amd both shots were about the same distance.
I'm certainly not an expert, but I don't think there's a way you could answer this question if you had a P.H.D in physics, other than saying.....The arrow passed through the animal because it had a path with little to no resistance, the arrow didn't pass through because it experienced resistance. The resistance could be so many different things, it would be nearly impossible to say.
Possibly because the doe was smaller and the buck had more mass or the shots were at different angles or distances affecting arrow velocity/trajectory?
Did you hit the knuckle on the second shot? What are your broadheads? Arrow weight? Distance? Etc...? Busting through the flat part of a blade is nothing really... hit the T portion... uh oh. Breaking a humorous is not hard unless you hit the knuckle... then uh oh again. A million and one scenarios... Agree PHD would do you no good on this one.