Your Faceless Minion is doing well!

As to getting blood outside of the body for a trail. . .I think it's kind of a tough ask outside of the odd fluke. Bullets seem to do a wonderful job of tearing up the soft organs in the juicy center off the torso, but the outside of course is tough muscle covered with stretchy skin - almost a self-sealing fuel tank. The critter will obviously bleed out in a hurry, but gravity is going to keep it all inside the cavity you just created and away from the hole you just made. Sure, there's bigger, more explosive bullets, but then you've got meat damage & lack of penetration concerns (& if it doesn't exit, no blood trail). The perfect answer remains elusive.