If you are inclined to hedge, then you are better off leaving the game off altogether. Then if you hit the other legs of the parlay, you can take your some/all/none of your winnings and put it on the last game.
I agree with above though, if you stand to win a substantially higher amount than you are used to, taking some profit might be wise. I would also look for a spot to arb it and win both ends, if possible.
But, the so called "experts" will tell you that if you are putting yourself in a spot where you are considering hedging, you are doing it wrong from the get go.
:smoking: