Pale comb is because of not being in lay.
Not sure about the yellow poop.
Pics might help.
Might cut out the BSL and see if it makes a difference.
Maybe switch to 18-20% protein all flock.
Molting can be tough on them.
A dose of electrolyte/vitamins might be good.
Skip the ACV.
What all and how exactly are you feeding?
When I have a bird that is acting off I isolate bird in a wire cage within the coop for a day or two....so I can closely monitor their intake of food and water...