[header] How to spot signs of bacterial infection in parrots [title] Look for changes in your bird's appearance. [step] Chlamydiosis can cause loss of appetite which can lead to weight loss. A parrot with chlamydiosis may also have ruffled feathers and in general may appear unkempt. 
[substeps] Symptoms such as weight loss or ruffled feathers can signal a variety of illnesses. If your bird has these symptoms, however, you should get it checked out by a veterinarian.