Necropsies are free in CA, plus you can use their fedex number to save on shipping.hi, my young daughters would be distraught if I sent her away. I might call UC Davis to ask what the process is, but I know the protest will be strong.
https://www.backyardchickens.com/t/799747/how-to-send-a-bird-for-a-necropsy-pictures
I send some, some I necropsy, but some I just bury, so I'll understand if you decide to just bury her.
-Kathy