My dog ( a Japanese Spitz) has recently developed an obsession with the plastic component which you find inside sqeaky toys. (it's the part which makes the squeaky sound) There are various things she does: She keeps it inside her mouth and walks around whining, she lies on the floor protecting it with her paws, she insists on getting onto the couch with you, even if there is no room. She wants to be close to you if she has the component in her mouth. She treats it like it is very precious to her and if you take it away she will not stop looking for it. She will allow us to take it out of her mouth and shows no agression when we do. She also pants very heavily. Please give suggestions or advise, we have no idea why she could be doing this.