A) Bears hibernate during winter, but aren’t sleeping the whole time. Hibernation for bears simply means they don’t need to eat or drink, and rarely urinate or defecate (or not at all). Bears do wake up, however, and move around inside the den. It’s kind of like your dog sleeping.Click to see full answer. Also question is, what happens if you wake up a bear in hibernation?To wake up a hibernating bear you would likely be in the entrance to the den. If the bear wakes and comes out of the den, you are in the way. It would be a really bad thing to do. Bears are known to be “grumpy” in the spring when they come out of their dens.Additionally, how Long Do bears sleep during hibernation? However, when biologists discovered the many metabolic changes that let black and grizzly bears hibernate up to 7 ½ months without eating, drinking, urinating, or defecating, they realized that body temperature was only a small part of hibernation. Moreover, do animals wake up during hibernation? Hibernation is when animals “sleep” through the winter. During this sleep, the animals will not wake up when they hear a loud noise or even if they are moved or touched. While in torpor, the animal can wake up quickly and easily.Do bears pee and poop during hibernation?While hibernating, bears don’t eat or drink (and therefore, don’t pee or poop), and their heart beats drop from 90 to 8 beats per minute. So, they get rid of their fecal plug as soon as they leave their den.