I believe they can
I know all about the Deer & Deer Hunting study that human urine attracted more deer than the doe urine (2nd place was new car smell)-
all that says is deer are very curious animals
I read where somebody said that they can't tell "predator" urine from "prey" urine. I don't buy it. I can smell changes in my OWN urine when I go (hold on, I'll explain), so I know the deer can with their superb sense of smell.
Now, I'm not saying I'm getting down there and smelling my own urine (I know that's what some of you were thinking<img src=icon_smile_wink.gif border=0 align=middle>) - but do this experiment and see if it works with you.
Eat 2-3 bowls of Super Sugar Crisp cereal or Sugar Smacks in the morning ...when you go to the bathroom later, I will just about guaretee that your own urine will smell like that when you go. You may not be able to smell it unless you are using a urinal (I guess because it is up closer to you. <img src=icon_smile_dead.gif border=0 align=middle>)I'm positive that other things that we eat also will give off some sort of odor, though probaly not as strong, which may not be detectable to us, but certainly would to a whitetail or other animal.
Extra protein and vitamins that your body doesn't use are passed throught your urine. That's why when you take a multi-vitamin, your urine will become a dark yellow, as opposed to clear color. Somebody like me, that lifts weights and eats what is probaly an excess of protein per day, also taking several vitamins, probaly passes alot of both out. I would venture to guess that carnivores and omnivores probaly pass more protein out than herbavoires...I would also think that this would give it an odor that would make it differ from an herbavoires' urine.
Like I said, I'm NOT saying that human urine will spook deer, because they are so curious. Howeverm, I would think that if they were to smell human urine, than look up and see a human that takes a shot and misses, they would learn to associate that smell with danger.
Just my personal theories
Try the cereal experiment and you will see what I mean
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