Baby Budgie Needs Help

Hello,

Somebody came a few hours ago to buy a few Budgies off me. When he was about to go they asked us saying “I have a baby budgie who always lays on its back, has one bigger wing and one smaller wing and doesn’t eat itself. Only the mum feeds it”. He said what can I do, is it going to die? I said I am not sure but I will see and contact you later and I have now asked for a picture of the baby. That is all the description I have so far of the baby. I have never heard or seen of this problem so I am not experienced in this but I am here to see if anybody knows of this. Thanks a lot.
 

I have now got some pictures