Difference between healthy and unhealthy birds

Healthy bird	Unhealthy/Sick bird
Alert and on guard	Tired and lifeless
Bright eyes and comb	Dull eyes and comb
Walk, run, stand, and scratch continuously	Sit or lie down
Eat and drink normally	Eat and drink less
Lay eggs normally	Lay less or stop laying eggs
Smooth and neat feathers	Ruffled and loose feathers
Soft compact droppings	Wet droppings with blood or worms, diarrhea
Breathe quietly	Cough, sneeze and breathe noisily