does this look like mareks poop?

[my beautiful girls]

Ophelia, my 3 year old blue australorp hen is sick. I'm getting a pcr test for mareks done tomorrow, but probably wont have results for 2 days. a flock mate that was 1 year old just passed a month ago from marek's per a necropsy. she has similar symptoms, but different poop. this is breaking my heart.

 

[my beautiful girls]

I want to add some more pictures. Ophelia went into the nesting box to sleep, not normal at 5pm or ever. She stood up and laid this membrane and rubber egg with a extra large yolk. she ususally lays medium eggs. any thoughts?? she is drinking water now.