Is it possible for you to contact the RSPCA and have the bird removed and taken care of better? An abscess in NOT OKAY.
I'm with you, this stinks of mismanagement.
Awww, the poor thing. :( Doesn't sound like an ideal set-up, no. Do you know if the birds are checked over by a vet before being placed in these aviaries?
Yes, contact them and enquire about the poor partridge. That doesn't seem right to me.