I see Val is only a little over 4 months old . Been there with mine , actually my guy wasn't as bad as your describing. Take her outside and wear her out ! Do you have friends with dogs ? Invite them over or just the dog over for play sessions, that WORKS ! I had a lot of frozen , clean dish clothes in the freezer for him when he was teething, they seemed to work well , as did large ice cubes chewed while under strict observation .
My puppy is going through his teens apparently and is teething. He has had to be put in his crate, time and again, and sent outside more than once, just for general misbehavior like stealing things, ripping newspapers, jumping on us, tearing up a box of tissues.
He had been learning his manners and behaving like a good puppy, but overnight he has turned into a hellion.
How long does this usually last for a medium sized dog? Is there any specific remedy for this kind of behavior or do you have to just roll with it until they grow out of it? We have been trying to give him more excercise, but this doesn't seem to do anything.