from what i understand (and i believe it) is that deer either classify pee as predator or non-predator. this is why fox pee is a good cover scent as they are no threat to deer. what i have found from experience is that peeing in the woods seems to be a bad idea if you drink coffee or eat things that can make your pee smell different or unnatural. I'm not sure I believe that doe in estrous pee smells different.Although it may(i've never smelled regular doe pee) it seems that it very well could be that bucks react differently to the smell of urine during the rut. i dunno.just my thoughts.to sum it up, i don't worry about carrying a bottle, let it fly.