It could be messing with his routine of crowing being moved every night and morning maybe you can let him stay with the hens for the whole night for a week and see if the crowing gets better.
I've always treated them with VetRx and it has worked for me. The foam is coming from inside her mouth, and getting on her beak, i've been wiping it away and she is drinking and eating
She is a black sex link about 3 years old I'll post a pic in a minute about 2 days ago it started, I've had respitory infections in my flock before, she has mucus around her nose and in her mouth and when I listen to her chest it is very crackly
My hen has a respitory infection I can't go into town to get VetRx until Tuesday though. I need a fix to help hold her over until Tuesday, right now I have some ACV( apple cider vinegar) in her water. Any solutions are helpful!! Thank you!!