I've been following this case since it surfaced. it's really quite tragic. ~200 of the birds (they offered to take more but were rejected) went to a rescue called birds and beaks rescue and rehab. I follow them on facebook and that's were I'm getting a good bit of my information from. This rescue had a vet come in and give ALL the birds they got an exam and lab work. They still (at this time) have lost 11 of the birds. They have also publically said that some of the other rescues that got some of these birds have given them NO vet care and already listing them for adoption despite a lot of them still being in critical condition with mites, overgrown beaks/nails, and most likely liver issues. The rescue I follow has posted pictures of some of the more severe cases and these poor birds were in such horrid condition.
edit: it looks like "Detroit animal welfare group" is having a vet come in and look them over. However the other rescue JoJo's(?) is deleting comments from people asking about vet care and in dms that have been seen she has not had them looked over a vet.
here is the post from birds and beaks talking about it:
edit again: Also from my understanding the 800 might not even be all the birds. The person who surrendered them was the son of an animal hoarder and he initially surrendered 600 in 7 VERY cramped cages and then another 200 in boxes with holes. it's possible there is more.