I heard of someone who had a dog hair in their tamagotchi and it made it have tons and tons of glitches, the charactars looked weird, the sound was really faint, and the age wasn't right, but when she debugged it, everything came back to normal.
I debugged my tama months ago and besides the stuff you get to do when your tama is debugged, it's normal. Anyone wants to know how to debug just pm me. Im' here 'till 9:15 my time. puppyluva