We rescued our puppy at 12wks old and she was so mellow and easy going but over the last 3mo's she has become crazy hyper and obnoxious. She has major separation anxiety i think. She is an indoor only dog and goes potty outside on a 4x10 foot faux grass pad. When she is with us inside, we can be sitting on the couch but as soon as i get up to walk into the other room or even into 6 ft away, she bolts past me running into me trying to get ahead of me. She jumps up into the air and just will not calm down unless I completely ignore her and leave the room. Also, she is chewing on my baseboards and door jambs inside and out and anything else she can get into. I'm feeling at a loss. Is this a normal behavior for a 7 mo old and will she calm down as she gets older? I feel helpless. I have tried training her and she is the most stubborn girl I've ever owned and we've had several dogs in the past over the last 25 yrs. I have even tried a light shock collar and she just ignores it and doesn't care. Thanks so much for any advice you can give. We are going to also look into professional training but right now I'm just wanting to know if this is normal. She is a very high strung dog and feel like major she needs to be on property somewhere with other dogs so she can run and play. My husband and I are working during the day and i feel like she also may not more attention that we can give her.