Last night on the way home from a party, I hit a deer in my Isuzu Wizard. It was a smaller deer and the SUV mostly just ran over top of it. The problem is that parts of its body got crammed inside the engine compartment from underneath and at least one of its legs is fully inside the part of the engine block where there is a lot of moving parts. The SUV now makes a loud noise that sounds like something is hitting inside the engine compartment when you rev it, and the shifting and power are both really jerky and uneven. Can I wait for natural decomposition to take place and the deer remains to fall out on their own, or do I need to pay a mechanic to take the motor out and remove whatever is in there?