I’m still at the research stage for breeding having been a budgie owner for many years. I have acquired some second hand breeding cages with doors for nest boxes to attach on the outside. I’m not looking to breed until next year so in no hurry, but would like advice on the best type of nest boxes/box sizes etc please. I have read a few websites and they all seem to suggest tallish boxes so babies don’t come out too early. Most of the boxes I see for sale are not tall though. If needs be we may even make our own so we can get it right, but it would be easier to buy what we need if possible. All advice welcome.