I'm sorry she's declining.Hello guys,
Thanks for your help and תודה רבה.
Her pupil seems nice and round, like the left picture. The iris is not grey.
I have started giving her vitamins.
It is now difficult for her to lift her neck for eating without falling, so I have to hold her while she is eating. Moreover, when she eats I hear sound as if some water exist somewhere in her digestion pipeline.
I wonder if such gradually progressive paralysis is indeed a sign of Marek's in mature birds?
Thanks,
Yonatan
Is her neck twisting like Wry Neck?
Is she able to poop?
Water sound, is her crop emptying - if you feel of it is it gassy or fluid filled?
It could be progression of Marek's. Suggestions of Botulism, toxins, moldy feed, etc., are good to investigate as well.
Botulism can be acute/acts very quickly - like anything, it depends on how much was ingested but it generally follows a pattern of leg weakness that progresses to flaccid paralysis of the legs, wing, neck and eyelids. Trembling/quivering, ruffled up appearance, feathers that are easily pulled out, difficulty breathing and loose droppings with excess urates are other symptoms.
Frustrating and sadly, some/most of the above symptoms can be from a number of conditions/diseases that affect chickens, so without a diagnosis, it can be a shot in the dark as to the cause.