Coccidiosis is easiest to identify by your bird's droppings. Stools will be dark, watery, and sometimes have noticeable blood. This is one of the symptoms that makes the stool so dark. Coccidia live in the soil and are found everywhere in the world. Climate doesn't matter - these are hardy little nasties. By the time you see blood in the stool, it can be too late for your bird. I'd advise not to treat with 2 medications at the same time, as some antibiotics can really irritate open wounds in the intestines, and this is what coccidia creates - perforations in the intestinal walls that bleed out. Corid is the trade name for amprolium, which is a coccidiostat. Underneath the name "Corid" on the bottle, you'll see (amprolium).
A droopy bird that goes off its feed can indicate general illness, but studying the stools will tell you volumes. It doesn't cost much to take a sample to the vet and ask them to run a fecal. Although the coccidia that infects birds can't infect humans or other mammals, the parasites look remarkably similar under a microscope. Even if your vet clinic doesn't routinely treat birds, a good vet tech can spot coccidia on a slide.
A fecal sample will also tell you if your bird has worms, and specifically what type of worms. This is critical to know, because different wormers kill different types of worms. If your bird has hookworm and you're treating with Wazine, you're wasting your money and your bird will just get sicker.
The UPA has an entire collection of health and disease articles that might be worth reading if you're new to peafowl. They've saved more than one of my birds when I was new to these amazing beauties.
phare, I'm so sorry to hear about your purple hen. We've all been where you are and it hurts.
