So lately I've noticed that (I think) Woody's voice sounds different. I say I think because he has also learned some new sounds like my yawning. Could he just be making these new sounds or imitating me in a different voice or could his voice be different meaning he could be sick? Any way to tell? Some things he says sounds different like his honk sound, other things like "Go lie down! I love you, go potty" etc all sound normal. He is still eating, drinking, talking, playing and pooping normally - any ideas? If he is ill, what causes voice change?