I was looking for a specific article but did not find it however.

if you google PTSD and parrots I think you will find several groups working with PTSD patients and neglected parrots.

https://shelterme.tv/news/pairing-re...sitive-payoff/

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cockatiel family :
Lucky (M pied)
Baby (M pied)
Pinky (F lutino) R.I.P.

Sunny mother (cinnamon)R.I,P.
Cheeky father (whitface)
Angel (eldest lutino F)
Mango (middle pearl F)
Popeye (male grey M)