Ah, teething. The age of complete and total brain fade.
She's still bright and enthusiastic, but she can't focus on me for more than a couple of seconds. Nor can we play tug now, so that limits our playtime, as she can already more than outrun me. Obedience is still fun, but she has trouble keeping her mind on things. Of course we're not doing anything involving duration! but she can't even look at me between one treat and the next. Silly puppy.