If you were to incubate cockatiel eggs what would the temp and humidity have to be? How old is too old for a female to lay and raise eggs? If a female is alone for years will she accept a male to raise babies? What size nest box should be used for premium egg rearing? If three birds are in a cage together will that affect eggs rearing (2 males one female)? I am not raising any birds right now but was given 3 cockatiels, the female is about 9 years old and the two males are 1 year or two old. They are all in the same cage together since I only had one cage. It is a fairly big cage and nobody fights or picks feathers. The female though keeps laying eggs up to 3. I was throwing them out, but now I let her lay on one or two and it didn't seem to be fertile, I have NOT seen any mating going on. So was just curious, I had a nesting box from long ago and put it on the cage and the female loves it and has been laying on her egg for 2 days now but I don't think it is fertile. Sorry for all the questions was just kinda curious. And it would be pretty neat if they would hatch some babies but I would like to be prepared if it does happen. Thanks for your time!