ORIGINAL: Sharpster
"One thing that has to be mentioned that it doesn't matter if it is a fixed head or mechanical there will be certain times when you absolutely pipe your shot through the vitals and you don't get much blood."
"It's not always the broadhead it's just the animal that has been shot."
The only possible reason that you would not get much blood from a perfectly hit animal is-A DULL BROADHEAD.(or maybe a mechanical head that failed to open).
-Sharps
You are 100% wrong! I have seen many animals, with all kinds of broadheads, be shot through the vitals and not have much blood while tracking.
I was in New Mexico on a 2 on 1 hunt and watchthe guy that I was with put a Muzzy right through the vitals and the elk left no blood.
It wasn't the BH's faultit was that the front leg was way forward and when he shot it the leg comes back and the entrance hole was covered up with the fat and muscle of the front leg.
I would agree with the fact that a dullblades will also cause smaller blood trails.