Hormones!! Maybe she has PMT? 
As for the chewing what we are doing is removing anything we dont want chewed out of her way. Leaving her toys and things she is allowed to chew. Im going to stuff a kong for her while we are going out.
If I do catch her chewing something she shouldnt I will make an angry noise to let her know I disapproe and remove it then encorage her to chew and play with something she should have. If I dont catch her in the act then its too late to correct her. Its unlikely she has the reason to put together wrecked item with the fun she had chewing hours before. If she did look guilty it would prob be a reaction to my annoyed body language.
I know I will have some casualties going through the puppy stage.
As for the chewing what we are doing is removing anything we dont want chewed out of her way. Leaving her toys and things she is allowed to chew. Im going to stuff a kong for her while we are going out.
If I do catch her chewing something she shouldnt I will make an angry noise to let her know I disapproe and remove it then encorage her to chew and play with something she should have. If I dont catch her in the act then its too late to correct her. Its unlikely she has the reason to put together wrecked item with the fun she had chewing hours before. If she did look guilty it would prob be a reaction to my annoyed body language.
I know I will have some casualties going through the puppy stage.