Is my Parakeet becoming sick?

I have a male 11 year old green parakeet. I noticed today that his poop is just a puddle of clear liquid. Last night i moved his cage downstairs And he is still down here because we are having someone fix the drywall in his room. Is this a sign of stress because he moved or is he becoming sick? I always make sure he has plenty of fresh water and food. Thanks for your help.