Okay Linda thanks for the extra information. Since this is on top of her back, rather than underneath, the first thing I would suspect would be an infection or a disease of the Uropygial gland, commonly called the preen gland. It's where the oils are stored for the preening of the feathers. I'm sure you've seen birds appear to rub their beaks and cheeks on that spot, then do their preening chores. Those glands can get stopped up, infected or have other difficulties. It may be that the heat from the lamp has helped to ease the discomfort but I'd strongly suggest you have a proper Avian vet take a look. If there is a problem there, and if it goes untreated, it can get so bad the entire gland could end up needing to be removed. Here is a link that will give you a lot of good, indepth information about this. Click here: Diseases of the Uropygial Gland In case you don't already have a good vet located, I'll give you some links to help with that. I'm also going to suggest you expand on her diet. In addition to proper Finch diet, she also needs some vegetables and other things like cooked rice, well cooked beans and more. Here is a link that should help with that. Click here: Nutrition - Finch Diet - General In summary, keep a very close eye on it and if there is not improvement by tomorrow, I would get her in for that checkup. I hope this helps but if you have any more questions, just let me know. Patricia
Click here: Find your local Avian Veterinarian
Click here: Avian Veterinarians Recommended by Bird Breeders and Owners http://www.birdsnways.com/articles/abvpvets.htm
Click here: World Wide Avian Vet Listing
Click here: BirdsnWays - Avian Veterinarians - Vets - Vet Services for Pet Parrots & Exotic Birds
This one looks like an advertisement for Harrison pellets but they are only sold by vets so it's another good list to check. Click here: Harrison's Bird Foods is a family of certified organic pet bird diets that were formulated to make your bird as he
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