Quote:
Find and join a local poultry club where you can get some hands-on mentoring. I'm not talking 4H, although there are many good 4H poultry groups out there; I am talking about a poultry club made up of breeders and exhibitors, at least some of whom have been raising chickens for many, many years.
Biting flies and mosquitoes can and often do carry disease. Her body being stiff is not a sign of botulism, although it does not rule it out. With the heavy rain you mentioned, that certainly set the case for things to mold. Wet pox is another possibility. And there are many more. If available at low or no cost through your state vet, get a necropsy done to find out the actual cause of death so you can do whatever is needed to protect the rest of your flock.
Do you have any books on keeping poultry? Storey's Guide to Raising Chickens by Gail Damerow is an excellent resource.
I am sorry for your loss.