Roo with large knot on right breast

[Sperg]

I have a 10 week old roo that has a large lump on what would be his right breast. He is still eating and drinking good, and doesn't seem to have any issue other than just the lump. He doesn't have any external injury that I can see, any one ever seen or heard of this condition before?

 

[ChickensAreSweet]

Sounds like his crop. As long as it is empty in the morning, that is OK as far as I know. Is he vomiting?

They can get sour and impacted crop. With that you would notice his crop still full in the morning from what I have read.

 

[pichuris]

Probably his crop. In the morning before eatting check him. Then 20 minutes after eatting check it again.
I don't think there is anything to worry about.