Hiding rooster

[Im Old Rooster]

Young Rooster has been hiding, he looks ok but his crow isn’t as good as it was. Snagged him and front chest seems to be a big bubble right side up.

 

[Sussex19]

That sounds like it could be his crop?
If it seems unusually big he might have impacted or sour crop.
Can you post a photo?

 

[Eggcessive]

Do you have other cockerels or roosters? Is he being kept from water or food? Do you have multiple places to eat and drink where everyone gets a chance?