Paralyzed Plymouth Rock

[Akrnaf2]

Hi,
One of my ~1.5 year Plymouth Rock hens started to show paralysis signs three weeks ago. She could hardly walk then, but still managed to move a few meters, walking on her ankles. Gradually the paralysis became more sever. Now she can only drag herself a bit, her toes are completely curled together, sometimes one leg is stretched behind the body, and today I noticed for the first time vibrations in one leg, when she is trying to move.
The strange thing is that apart from that she is totally fine. Her comb is red and thick as always, her feathers look fine, eyes always open, head is not sunk into the body, and she makes normal sounds. Moreover, she even laid one egg about 10 days ago (the egg was fine). And above all, she has excellent, constant appetite (though she doesn't drink when I offer her water, so I'm putting water inside the food).
When I noticed the paralysis 3 weeks ago I immediately started administrating amoxicillin and norfloxacin, since I was sure I was going to lose here in a couple of days. I made afterwards bacterial examination of her poop which came negative. Also, no parasites were found in her poop.
Also by manual outside inspection she doesn't seem to break any leg.
Has someone experienced such a case? I have passed over all diseases in the book I have and found none which suits the age, signs and duration of my case. The closest were Marek and acute Calcium deficiency (I can recall the name). I would appreciate your help!
Yonatan, Israel

Hello everyone you should excuse me but I prefer to speak in my native language.
Don't think it's Calcium deficiency, she layied an egg.... I think it is Marek.
!ושלום יונתן
מאיפה אתה בארץ? זה לא מחסור בסידן מאחר ואם זה היה המצב היא לא
.הייתה מטילה ביצה
?אתה יכול לבדוק את העין שלה ולראות האם הקשתית היא עגולה או משוננת?
אני חושב שיש לך בעיה של מארק שהתפרץ.
ראה תמונה

 

[BigBlueHen53]

is there a way to translate this?
@Akrnaf2 Shalom

 

[Eggcessive]

Thanks Benny!

 

[Wyorp Rock]

is there a way to translate this?
@Akrnaf2 Shalom

For translations just go to Google - translate Hebrew to English, paste in the text:
This is a "loose" translation of what Benny wrote.
And Shalom Jonathan
where are you from? This is not a calcium deficiency since if it were, it is not
She was laying an egg
Can you check her eye and see if the iris is round or jagged?
I think you have a problem with Mark breaking out.
see picture

 

[BigBlueHen53]

Thanks!

 

[yon100]

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

 

[Akrnaf2]

For translations just go to Google - translate Hebrew to English, paste in the text:
This is a "loose" translation of what Benny wrote.
And Shalom Jonathan
where are you from? This is not a calcium deficiency since if it were, it is not
She was laying an egg
Can you check her eye and see if the iris is round or jagged?
I think you have a problem with Mark breaking out.
see picture

I could not say it better!

 

[Akrnaf2]

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

Could it be a poisoning?
Botulism -do you have a compost pile?
Algae poisoning-do you have any brown/reddish Algae bloom in the water vessel?
Any damp feed?
Are your chickens vaccinated against Newcastle Disease?

 

[yon100]

Could it be a poisoning?
Botulism -do you have a compost pile?
Algae poisoning-do you have any brown/reddish Algae bloom in the water vessel?
Any damp feed?
Are your chickens vaccinated against Newcastle Disease?

Botulism - as far as I know should be very acute.
Algae poisoning - shouldn't this also develop very rapidly?

They were vaccinated, but I'm not sure against what.

 

[Ribh]

An out of left field one: Do you have paralysis ticks in your region? I know chickens eat them but occasionally one lodges where it can't reach.