I'm curious to see what 4yo lab will be like next season without his nuts, which he had removed a couple of weeks ago. It was a night and day difference in how laid back he is now, he sleeps more, sleeps harder, doesn't mark every vertical object in the yard, etc. Only one of them dropped and the vet nor myself had ever noticed. She said that nut that hadn't dropped, was too warm inside, and would produce too much testosterone, and almost always end up cancerous.