Help - I have 3 year old Retriever bitch who is still chewing - destructive chewing!! Her latest fetish is for the windowsills of their outside room in their enclosed yard. She had a litter of 2 3 months ago and was fine whilst she was in whelp and caring for the pups, but has just started again. I work 3 days per week and they have the run of the garage, their dog room and the yard - she's with her mother, sister and now daughter - so she's not lonely. In desperation, I have caged her, but I really hate locking her up - any suggestions as to why she's doing this. None of the others have been chewers - although too early to say about the pup.