You are evil Konifur, Auntime he is just trying to scare you.
The truth is like this: the vet removes his gumboot(wellington) places the boot over the dogs head or if it's a cat he rams it firmly head-first into the boot (this protects the vet from the cats claws) Then he gets out a scalpel and cuts a slit behind the testicles, removes the 'wee packages', a fast slash, slash, to remove them, then a quick stitch or two and the wee beastie is DONE. Thus the altered animal then removes himself quickly from the area.

the two bricks method sounds much more fun.