Hi! I just bought a pair of zebra finches from a pet shop a few days ago and have some questions that I cant find the answers to in books or online. Any help will be much appreciated 
First off, they are a boy and a girl from the same clutch. I do NOT want any breeding going on, as they are related. Plus I dont know what I'd do with a whole bunch of baby birds and nowhere to go with them. I just want these blokes as pets. I dont have a nest or nesting material in there, but I've seen the male singing and jumping on top of the female. She seems to be enjoying it, but I heard that you shouldnt let them have babies too often. If she lays, I'll just dispose of the eggs, but will she still be healthy or will i have to separate them?
Secondly, the female is in fine form. She's larger than the male and has all her feathers (the only one at the pet shop that had them all). But my male is missing some feathers under his chin and he only has one tail feather left. I read that this could be because the pet shop houses too many birds together and they fight. He seems to be very active and healthy otherwise, I've observed them both bathing, preening (even eachother), and eating the cuttlebone and drinking and eating, and he sings constantly, a very intricate song. She doesnt seem to be bullying him, so are there any other signs of sickness i should look for in them? the other two finches at the pet shop didnt look very active or healthy. I've done everything to make them comfortable, I have spray millet and dried greens with the occasional apple slice in addition to food, vitamin supplements in their water, mineralized grit with calcium, a cuttle bone, a swing, a bath and two perches in a 15" X 15" X 24" cage.
Thanks much!

