Human urine won' t alarm deer, unless a human gives the animal reason to feel threatened, thus, associating the odor with danger. This is one good reason to keep your " nature breaks" to an absolute minimum, helping your chances if you spook an animal during a hunt. Try to be careful from spooking any deer after a break. Wait until well after dark before getting out of a stand or a blind. If deer are in the immediate area, barking like a dog is my favorite trick to ward off any remaining deer in a field. The deer will leave without being startled enough to never come back, in fact, they will go right back to their normal routine usually within an hour with no harm done.