Often when infected with certain diseases game birds will display constantly ruffled feathers. Ruffled feathers are not specifically a sign of disease, and can be caused by other issues such as prolapse, boinking, severe cold, etc.
Here is a list of diseases commonly known to have the symptom of ruffled feathers.
http://www.thepoultrysite.com/diseaseinfo/162/ulcerative-enteritis-quail-disease
http://www.thepoultrysite.com/disea...m-pullorum-disease-bacillary-white-diarrhoea/
http://www.thepoultrysite.com/diseaseinfo/101/necrotic-enteritis/
http://www.thepoultrysite.com/diseaseinfo/143/staphylococcosis-staphylococcal-arthritis-bumble-foot/
http://www.thepoultrysite.com/diseaseinfo/61/fowl-cholera-pasteurellosis/
http://www.thepoultrysite.com/diseaseinfo/130/salmonella-gallinarum-fowl-typhoid/
http://www.thepoultrysite.com/diseaseinfo/38/coccidiosis-upper-intestinal-e-acervulina/
http://www.thepoultrysite.com/diseaseinfo/36/coccidiosis-midintestinal-e-maxima/
http://www.thepoultrysite.com/diseaseinfo/34/coccidiosis-ileorectal-e-brunetti/
http://www.thepoultrysite.com/diseaseinfo/117/pseudotuberculosis/
http://www.thepoultrysite.com/diseaseinfo/33/coccidiosis-caecal-e-tenella/
http://www.thepoultrysite.com/disea...s-s-enteritidis-and-s-typhimurium-infections/
http://www.thepoultrysite.com/diseaseinfo/37/coccidiosis-midintestinal-e-necatrix/
Here is a list of diseases commonly known to have the symptom of ruffled feathers.
http://www.thepoultrysite.com/diseaseinfo/162/ulcerative-enteritis-quail-disease
http://www.thepoultrysite.com/disea...m-pullorum-disease-bacillary-white-diarrhoea/
http://www.thepoultrysite.com/diseaseinfo/101/necrotic-enteritis/
http://www.thepoultrysite.com/diseaseinfo/143/staphylococcosis-staphylococcal-arthritis-bumble-foot/
http://www.thepoultrysite.com/diseaseinfo/61/fowl-cholera-pasteurellosis/
http://www.thepoultrysite.com/diseaseinfo/130/salmonella-gallinarum-fowl-typhoid/
http://www.thepoultrysite.com/diseaseinfo/38/coccidiosis-upper-intestinal-e-acervulina/
http://www.thepoultrysite.com/diseaseinfo/36/coccidiosis-midintestinal-e-maxima/
http://www.thepoultrysite.com/diseaseinfo/34/coccidiosis-ileorectal-e-brunetti/
http://www.thepoultrysite.com/diseaseinfo/117/pseudotuberculosis/
http://www.thepoultrysite.com/diseaseinfo/33/coccidiosis-caecal-e-tenella/
http://www.thepoultrysite.com/disea...s-s-enteritidis-and-s-typhimurium-infections/
http://www.thepoultrysite.com/diseaseinfo/37/coccidiosis-midintestinal-e-necatrix/