Could be the tumor but infection can also stink badly.After it was all done, the thing still smelled. So I guess it's the tumor that stinks.
I'm old school so I might would go back to peroxide and neosporin for a few days. See if the odor improves.
Eating and socializing is good!He's not ready to be euthanized yet, still eating and socializing with the hens
Well.....he is an older guy??? LOLnot mating them
Does he crow?