My understanding is that they will recover faster if they are younger. That seems to negate the "cruel" argument. Another reason I like early neuters is that, IMO, especially with boys, the hormones will affect some of their behaviors and beyond a certain point of (mental) development, neutering may not reverse it. For example, Prego was neutered at the HS and was already three. He has a bit of overstimulation agression. I always wonder if he had been nuetered earlier, if that would have been different. I've had him well over 3 years now, so the hormones have had plenty of time to leave his system.
I'm no expert on this, and it's just MO.
I'm no expert on this, and it's just MO.