Okay, thanks for that information. Unfortunately, I'm not going to be able to give you as many specific answers as I'd like because there are still a couple of unknowns. 1. Exactly which type of Finch you have and, 2. The gender. Some Finches can be sexed visually, others cannot. Hopefully, you have all the same type at least. Ideally, a cage of Finches should have the same number of males as females. If you have an unbalanced group, male to female, that can be part of the problem. Also, your cage is a bit on the small side for that many. Because they are not what we call hands on birds, yet they are very active, they must have enough room to fly back and forth across the cage without perches and other accessories in the way. They need the exercise and it's not like you can turn them loose in your house, let them exercise, then expect them to step up on your finger when you are ready to return them to the cage. If they are not getting enough exercise, there's another possible cause. Ideally, a finch cage will have one of the little finch nests, for each two birds. Here is a link that will show you examples of suitable nests for them. You do not want, nor need the wooden next box shown but any of the other examples on that page are fine. Click here: Text Search: finch nests : Birds If each "pair" has their own nest, that eliminates one more reason they may have for squabbling. As for diet, they need equal parts; white millet, Japanese millet, panicum millet and plain canary seed. However, an all seed diet is not sufficient to maintain good health. They also enjoy grated fresh foods such as sprouts, carrots, broccoli and an occasional piece of apple. Be careful with the wet foods and don't leave in the cage more than a couple hours. It can quickly grow bacteria which will be harmful for them. If they are not getting, and have never had proper diet, yet another underlying reason for the problem. All this said, it would be a very good idea to take them in to see a well qualified avain vet for a check up because plucking and excessive loss of feathers can be indicators of illness. You are going to need someone with experience to see them, in person, to help you determine which type and gender you have anyway so the vet check up can accomplish several things, all at once, for the price of one visit. I'm going to give you some links that can assist you in locating a good vet in case you don't know of one. I'm also going to give you a link to some more basic information about Finches. I hope this is helpful to you but if you have further questions, don't hesitate to ask. Patricia
Click here: The Finch Niche - Finch Information & Articles by Myra - The Perfect Society
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: Avian Vet List http://www.parrotparrot.com/avianvets/
Click here: Birds and Exotics Animal Care
Parrot C&onsultant
Published author, free lance bird behaviorist, adviser to the parrots at Sarasota Jungle Gardens.