Fluffed feathers

Increased sleeping or eyes closed

Inactivity or lack of interest in surroundings

Decreases or changes in vocalization or singing

Sitting low on the perch

Sitting on the bottom of the cage

Hanging onto the side of the cage by the beak rather than perching

Weakness

Losing balance, teetering, or falling off of perch

Walking in circles

Trembling or seizures

Changes in breathing, such as breathing with open beak, wheezing or clicking sounds when breathing, sneezing, tail bobbing when taking a breath

Discharge or crusts around the nostrils

Exercise intolerance (heavy breathing after exercise, or inability to exercise)

Eyes dull, sunken, or abnormal color

Drooped or elevated wing(s)

Lumps or swelling of any portion of the body

Picking at the feathers or body

Not preening

Changes in color, consistency, quantity or frequency of droppings or urine

Increased or decreased appetite or thirst

Vomiting or regurgitation

Weight loss (use a scale) and/or prominent keel (breast bone)