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Explain blackhead to me, please.
It is Histomoniasis or in a nutshell what Ralphie has linked you to.
My spot has some low lying areas which are damp often and the chickens love scratching for earth worms. Unbeknownst to me at the time is they carry the gut parasitic worms or eggs, which then carry the protozoan. I'm sure that's how a lead hen of mine got it. In line first for rooster gifting.
I found her standing in a nest box 'sleepy' during the middle of the day. Her fluff wet (mucous) watched her poop a bright sulfur colored mucous poop. Jumped on line and started researching. Came across a university of Mississippi article on blackhead. It also mentioned a caseous (cheese like) poop coming from the cecum which would be coagulated pus. Sure enough the next day under Sylvia was a cheese curd that you would not want to batter up and fry.
Diagnosis confirmed. I called the vet he wanted to see her. I wouldn't plus take a half day from work to drive. ( which we all know living rural that's a big expense) but lucked out and found info on Flagyl also disguised as fishzole. Then broad spectrum worming. Valbazen.
It took a lot out of her. She had begun to molt which is why I think she got it also. Immune system dropped. It was lying in wait.
Blackhead attacks the liver. So you would see a scarred up liver on her when butchered. It is deadly in turkeys so I cannot keep those big birds. When the birds get sick with this they are also getting secondary ailments which can create respiratory issues, cyanotic heads- and so the old folks called it blackhead.
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