Sorry for the delay! I was waiting for some marked progress before reporting back..
We ABSOLUTELY appreciate all the help! We have varied Junior's diet as he does have a large goiter like bump under the wound. We gave him the antibiotics and are watching him very closely. The wound seemed to be healing a bit 3 days ago, but now has regressed. Not larger, just has raw edges again where before the edges were turning white and seemed to be healing.
He is still very, very lively-- Eating well and swimming fast. We are taking all your advice seriously and have been spending time reading up on goiters.
Thank you all very much! You are terrific!