I don't usually go by the dropping's,Other than the fact big deer big poop,Little deer little poop.I have seen some doe's that have left some good size dropping's
I know this probly doesn't help any,Forbuck travel routes I usually look for rub's or scrapes.
If you have doe's there than buck's will be there sometime.

BOB
BE SURE OF YOUR SHOT&WHATS BEHIND YOUR SHOT.,,MAKE A QUICK CLEAN KILL