DutchBunny03
Loving the herd life
Hope she gets better
!!

(we haven't given her vit B since the corid because corid mimicks thiamine and thats what coccidia feed on per internet research).
Only just seen this post (different time zone....same issues!).
A severe worm load would sound to be the most likely, and tapeworms use all the food whilst roundworms suck the blood. Panacur should kill the tapes. Tapes never kill on their own, but you'll never fatten a ewe with tapes.
Hopefully you'll have your faecal sample now.....even if that meant gloves and fingers!
Just a thought...Over here, where rain is VERY plentiful....liver fluke can wipe out animals pretty fast (though the sheep is often a fat and fast growing lamb). I have had to treat for fluke more often this year which has been wet and mild and encourages the snails which are the secondary host. If fluke is an issue where you are, treat her.....the medication names may be slightly different 'across the pond', but ivermectin, Panacur etc don't treat fluke.
I DO hope she pulls through, she looks a lovely girl.