What led to me not getting a thorough & official necropsy;
I called the AZ dept of agriculture last Friday and left a detailed message on the answering machine. A few hours later, I called back again, but got the same answering machine. Monday, I still hadn't heard from them and called back again, getting the same answering machine - at that point, I just gave up on them and started looking for avian veterinarians.
I found two vets that were experienced with treating chickens - one reference was given to me by a BYC member:
https://www.backyardchickens.com/web/viewblog.php?id=6972
The other was referred to my by the vet who treats my dogs.
Both of these veterinarians send their birds out to the U of A for necropsies. I didn't ask the price of one vet, but the other vet said the cost was $200-$300. I called the University of AZ (a 2 hour drive from me, but the only university here that does necropsies) and asked them their price to do a necropsy on a chicken - their cost is $190 - no wonder the vet charges at least $200.
One of the veterinarians was able to come to the phone and talk to me. He is also a chicken owner (has about 40) and after asking a lot of questions & listening to me describe the symptoms, he recommended not sending her in. He said that it's not unusual to lose a chicken every once in a while and unless I had another one come down with the same symptoms, not to worry about it. He said sometimes you can have a weaker chicken that can't take stress.
He asked if all my chickens came from the same place. Splash didn't. She came from some eggs I bought from a local seller- she is the only chick to hatch from those eggs (my broody's fault, not the seller's).
I have 17 more pullets. Seven of them are 18-20 weeks old - three are 9 months old & 8 of them are 11 months old - none of them have ever been sick or had any physical problems (except for bumblefoot), so it made sense to me not to spend the $200, especially when it may just be a one time incident.