Originally Posted by LawGuy
I have heard that since my dog was neutered about 17 years ago, they have changed the procedure a bit and either leave the testicles in place (just not suppyling gametes) or replace them with silicone replacements.
I've never had a vet leave the testicles (for dogs or cats), and you have to pay extra for the silicone implants (lots extra! Like $100-$300 or even more!). They do use gentler methods now, and usually leave the scrotum.
But yeah, there's usually a lot of swelling, so you can't tell right away. And if the male was a full tom, his scrotum will never completely shrink away to nothing. But you can still tell that he's not intact (in most cases). My Dusty was a full tom when neutered, and it looks like he still has "something". However, maybe your vet does it differently. You can ask if you're really curious.