You’ve probably heard of the castrati,
male opera singers of centuries ago who had been castrated (voluntarily) before puberty so they would retain a sweet soprano voice all their lives. Alas, one other effect of prepuberty castration was that the castrati tended to be extremely obese (which, as far as their singing was concerned, was not a
bad thing).
It appears that neutered
tomcats are, in general, more prone to obesity than are unneutered toms. In fact, a neutered tom could eat the same amount as an unneutered one and gain weight, while the unneutered tom might lose. Not every neutered tomcat becomes obese, but as a neutered pet ages, his weight should be monitored.
