Are you positive about the gender of both birds?
Ever had any eggs or any hatchings?
Can you look under her wings to see if there are any bare spots there?
Have you seen any change in the appearance of the droppings?
Have they ever been taken outside for any reason? (Cage on the porch for fresh air, anything like that?)
What are their bathing habits?
Tell me about their normal dailey diet.
The extra information will help me to give you my best advice.
Okay Amber, thanks for the extra information. It's very helpful. Because you have had this relocation in the mix, for now, I'm going to suggest to not get too excited about the feather situation. It could be nerves but, it could also be something in the new place she is reacting to. I don't know if it is a new house or apt. or just new to you but in either case, many times there are irritants and maybe even some toxins from fresh paint, carpet cleaning, just general cleaning and so on. Because of that, I am going to urge you to keep a very close eye on both of them for a while. Things to stay alert for will be that change in droppings, changes in behavior, sitting with feathers fluffed, sitting on the cage floor instead of a perch and sleeping an inordinate amount of time during the day. Because birds do their best to mask all symptoms, by the time we see them, it means they have been ill for a while. So if you see even one, do not wait for another. Get them both to a good Avian vet for a check up. As for the diet, I have plenty of personal experience with picky eaters so I know what you are going through, but for their sake, you have got to continue offering, everyday, vegetables, leafy greens and much more. Do not give up. Their life depends on it. Eating with them is one good way to entice them to try new things. Fix them a plate of a variety of safe foods and bring them to the table with you to eat. They won't like everything but they will eventually give in and eat some of the people foods they need. Also, since there is a good chance you have a female, don't ever let her run out of cuttle bone. The calcium that supplies is another possible life and death situation. If she ever decides to lay eggs, without enough calcium in her reserves, she won't be able to make firm shells. Her eggs will be too soft for her to pass. She will be egg bound and without immediate, proper intervention, she will die. I'm going to give you all the same links I give to all new Tiel owners. I realize you are not a novice but there may be information in them you do not have yet and it could be vital to you and them. There will also be help with diet and with recognizing all the possible toxins to help you avoid dangerous exposures. I hope all this will be helpful for you but if you have anymore questions at all, just let me know. Patricia
Click here: Avian Veterinarians Recommended by Bird Breeders and Owners http://www.birdsnways.com/articles/abvpvets.htm
Click here: Avian Vet List
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
Click here: BirdsnWays - Articles & FAQs on pet birds, pet parrots & exotic bird species - Cockatiels
Life After Weaning - Your Companion Bird and You
Caring For Your Pet Cockatiel
Fatty Liver Disease in Cockatiels
Click here: Cockatiels as Pets - Choosing a Cockatiel, Cages and Feeding
Click here: Diet: Safe & Toxic Foods
Click here: More Birds Die as a Result of Air Fresheners: That Stinks!!
Click here: Alerts Dangers and Toxins for Pet Birds Parrots
Click here: Bird; Birds: Safe, Toxic Trees, Woods. Safe Tree Wood. Poisonous. Parrots.
Click here: Toxic and Safe Plants/Trees for Birds - Household Poisons
Click here: Birdsnways - Safe Plants & Trees for pet birds, pet parrots &exotic birds
Toronto Humane Society :: Common Poisonous Plants
Click here: Bird Proofing Your Home: Household Hazards for Birds
Click here: Bird Proofing Your Home - Avoid These Pet Bird Hazards