Hi kathy & kasey! Welcome to BYC.
I've been fairly lucky to not have odd injuries or symptoms from my chickens, but that makes me ot have the knowledge. I wish I could offer some help, but I am clueless.
The good thing about having so many members is- someone probably has an idea . The bad thing about having so many members is sometimes a question gets overlooked.
Hopefully someone who is a little more helpful will come along and offer something to try. Do you happen to have pictures ? Or maybe describe the spots a little better? Does he free range, or have a run? Is he the only one with spots? Are there any other symptoms, or anything else seem a little off?