Annika, I'm afraid that I'm gonna have to respectfully disagree.

As previously posted there are three factors that determine how much blood will be left on the ground to follow:
1) Shot placement - a gutshot will never leave a great bloodtrail.
2) the presence of an exit wound - pass throughs will leave better bloodtrails because there are two holes to bleed from.
3) the sharpness of the broadhead - This to me is the single most overlooked or most taken for granted aspect of why good shots sometimes leave poor blood trails.

Broadhead manufacturers have been telling us for years that their blades are razor sharp and ready to hunt with right out of the box. We have heard it so many times that we often don't question this claim. The problem is that it is rarely true. Some brands are better than others but, frequently, even brand new replacement bladesneed to be sharpened.

I will have to stand by my original post that if you double-lung or heart shoot an animal (deer familly), and get a pass through, but no bloodtrail, then the only possible cause is that thebroadhead was not sharp enough.

I specificly said deer family animals becauseanimals like bears, Russian boars,and musk oxen that are thick furred often leave poor blood trails because the fur acts like a sponge and can soak up the blood as fast as it comes out. They may be bleeding like the proverbial "stuck pig" but the blood is not making it to the ground. -Sharps