I'm sorry that you lost 2 of them.
Giving a Direct Oral Drench of Corid is a good idea. Remember this is given 2X a day for 3 days IN ADDITION to them drinking the mixed Corid water at a rate of 2tsp Liquid Corid to 1gallon of water given for 5-7days.
You need to address those crop symptoms. What have they been eating and do they have Chick Grit Available?
Photos of the current poops?
Do work on them drinking the mixed Corid water to stay hydrated, it's a fine line of keeping them drinking and addressing a crop. Are the crops Fluid or Air filled? Hard? Doughy?
I'd start by giving them each 1/2tsp coconut oil twice a day. Harden the coconut oil in the fridge and give them little chunks.
I'd go ahead and get some Clotrimazole or Miconazole so you can begin treating the crop as Sour.
It would probably be a good idea to have an antibiotic on hand as well. Amoxicillin would be good choice, this *should* treat enteritis if this is part of the problem.
It's disheartening to lose this many at once and not know exactly the cause. If you lose another, refrigerate the body and send it to your state lab for analysis so you know what you are dealing with and can treat going forward.
https://www.metzerfarms.com/poultry...RV6Xf8qXF3yk5XosqtQewtE0HrYkEy9nQiClC2WU18Mqa