Notes on Harold at 4 months:
He's losing his baby teeth! (thank god). Of all the things we are most looking forward to during this puppy stage, is for the teething to end.
He's got all of his shots, so he can now go on the big trails with us. That actually makes me the most happy.
I've noticed he hears more "beyond" what he could.
He's found his voice, and will bark if he feels the need. :)