Infected or impacted crop?

[4DogFarm]

My 4 yr old rooster is moulting, and I just noticed that he's got some red patches. The crop area is hard, non-movable, and a bit warm. It won't move at all. The swelling sort of wraps up around his neck. This erupted some time between 4 pm last night and this morning. Any ideas?

Thank for any advice. Right now he's in a pen by himself, which probably causes him a bit of stress. And, edited to add, there is no smell from him at all.

 

[Eggcessive]

I'm not sure about the red splotches on his chest. The treatment for impacted crop is to flush the crop with water, and massage it several times a day. Some recommend giving a teaspoonful of vegetable oil, but water flushing is the key. Also, make sure chickens always have plenty of grit. Crop surgery is sometimes needed after a period of time when you fail at flushing it. Here is a link about impacted crop: http://www.browneggblueegg.com/Article/ImpactedCrop_OldWay.html

 

[Eggcessive]

Here is another link: http://www.the-chicken-chick.com/2012/04/answers-from-chicken-vet-on-impacted.html

 

[Eggcessive]

Here is a link for crop surgery: https://www.backyardchickens.com/t/229796/crop-surgery-performed-more-pics-how-to-steps-posted-pg-10