Welcome To BYC
I'm sorry Marry-Kate is not doing well.
Does she have any lesions inside her beak?
Any lice/mites?
She's not laid an egg in a while, I'd give her 300mg Calcium Citrate+D3 now, then once daily for 5 days, see if she's able to expel an egg.
You mention she's got something going on with the foot, a brown spot? Do you have a photo of that?
I'd also give her 1/4tablet B-Complex daily. Cut out the Apple Cider Vinegar.
Thank you for your response! She has definitely not laid an egg since at least Sunday. I’ve been giving her vitamins but I’ll definitely pick up more tmrw to give specific dosages. I also stopped apple cider vinegar yesterday and switched to ampro just in case this is cocci. Every morning I give her scrambled eggs with oregano and thyme along with scratch and grit. This morning I gave her yogurt as well which she was all about. I’ve checked everything on her and have noted the following issues which I am not sure if are issues of their own or symptoms:
-Missing feathers from her upper neck right under her beak (I see her pulling at the remaining ones occasionally) red upset folicals where feathers are missing
-feathers on back slightly raised
-lameness in left leg (picture of bottom of foot included)
-slight ambition for food but not so much for water
-potential scaley-leg mites
-no presence of crop after she eats. Haven’t felt one on her in two days.
-darker green poop with yellow dinged urine (hard form like broody poop)
-Comb parish but better than first day
-yesterday she clenched her left toes but today she didn’t seem to.
-occasional standing when I’m cleaning her bed, but not real movement other than occasional shuffle waddle (uses wing to catch her fall)
-panting occasionally when she seems a little stressed
Here is a list of things I haven’t noticed:
-no lice
-no worms in poop
-no drooling or puffy eyes or eye drainage
- vent clear
- no feeling of egg stuck inside
-no foul breath
-no cuts in mouth or extremities
-no greasy poops
-no Cecil poops either actually
- no drowsiness
Maybe this information helps!

thank you for your help!