my fairly newly adopted sweetheart (one year old) has been sporadically nibbling on plastic. Ususally she prefers plastic bags like grocery bags or garbage bags. Sometimes she goes for the harder plastic handles, but seems to enjoy the noisier ones. I worry about her injesting plastic - don't know why she does it? Sometimes is gets so bad that we have to gather up all of the loose plastic - ANYTHING plastic just to keep her from eating it. What in the world is going on??