Aussie Finch Forum

looks to be a couple of years old but may be worth a read, topics covered include:
Feather Plucking, Egg-bound birds , Common Aviary Diseases and Problems, Scaly feet, Lice, Listless Birds, Feather-mite, Breathing Difficulties, Scouring Birds, Scaly-Face Mite, Dietary Problems

http://www.birdworld.com.au/bw_veterinary.php