Those chicks are adorable. I have a one year old semi-tame budgie and a 4 month old. They are together for almost 3 days now in the same cage and are inseparable. I find it so cute that I put my one year old budgie on my shoulder, that my 4 month old budgie follows. I realise now that she would propable never bond with me since she bonded with my male bird. Thanks for all the helpful advice.