I have a neighbor who is breeding cockatiels and parakets and they are in the same cage (it is a really big cage, five by five by fourteen) and I was wondering if the birds would not get along once breeding commenced? she has not had any problems yet but only the cockatiels have started nesting, I don't know if the tiels would kick a parakeet off its nest or not but my friends has not had any nesting parakeets yet, should she separate them? or give them more time?