I' ll back up what Nub said with this,

Even a moron can find a dbl lunged/heart shot deer. It takes a better than average tracker to find marginally hit deer, and then sometimes they still don' t find em.

I can' t tell you to quit or stay but if you are gonna keep at it, PRACTICE PRACTICE PRACTICE!

Don' t shoot at another animal until you are confident you are gonna dbl lung it, then go get your animal.