German Shepherd Kerry is bored.
Although it’s natural for adult dogs to sleep for up to eighteen hours a day, this is only so if the rest of the time is filled with stuff natural to the dog – and its breed. Sleep probably won’t be in long blocks of enforced inaction during the day, but dozing between doing other things.
Young dogs in particular need action and fulfilment (just like young humans) or they get bored.
Kerry is a beautiful eighteen-month-old German Shepherd living with another GSD, Lemmy, aged four. They are both gorgeous dogs with lovely, friendly basic temperaments.
Young Kerry, unfortunately, probably isn’t getting enough action in her life and she’s very easily aroused. I saw this by how the smallest thing results in her leaping at someone, me in this case – grabbing my clothes and even hair with her teeth.