bird puffing up

by marco
(fresno,CALIFORNIA,US)

i have a california quail that ive been raising for 3 years and it was very healthy but lately its been quiet at the corner of the cage it eats a little bit drinks water but it seems sad and it puffs up for long periods of time i also noticed it poops white liquid it has gotten really skinny and light i want to know whats wrong and what i can do