It will make a huge difference for them as well. Lucky, he gave you some symptoms of something... before there was a widespread issue, and you are paying attention!
The ladies might do well to have some oyster shell in a side dish if they are laying eggs as they do need around 4-5% calcium usually during lay. A small bag should be good for only two ladies.
I'm not good at seeing things on the computer... but as suggested by eggcessive, there may be more going on that treatment could help.. a fungal infection.. I saw Thrush in my children once and it was awful and painful for them and it did sound like you might have had a hint of sour crop trying to start...
https://thepoultrysite.com/disease-guide/candidiasis-moniliasis-thrush
The other suggestion of canker is also another possibility and describes drooling as ONE of the symptoms...
https://thepoultrysite.com/disease-guide/trichomoniasis-canker-frounce
https://www.merckvetmanual.com/poultry/trichomonosis/trichomonosis
Now I know you said an avian vet isn't a possibility for you.. but it's possible a standard vet might be able to culture or even know by experience just from looking, Another suggestion might be sending a culture to your state poultry lab which should be listed in the following link..
State poultry labs
Your welcome for the support.. thank you for trying to do your best for your animals!
