We had six big aviary when I was a kid and one was solely for love birds more nest boxes than pairs ,good strong wire doubled as they chew the frame to bits and plenty of branches to strip.they strip the willow carry it to there boxes in there rump area .
That's also how your ment to be able to sex them,give them a few small willow sticks and it's the cocks that will tuck them in their rumps to carry them to the nest site,not my thing and that's all i know about them sorry .
Me to mate ,I don't know much about them where talking twenty year ago we had them , like dido said probably worked b