Crap I had an email from him a while back wanting one of my roosters. I responded but never heard back from him so just assumed it was one of those stupid craigslist hoaxes. He was a long ways away from me so who knows.Yes they can be surgically altered in two ways, there is a procedure a Vet here in Oklahoma does to "decrow" a rooster, and he learned it from a vet in Arizona. The OK vet has invented better tools and has had much success, even success in shipping around the country peoples pet roos to him, he does the procedure and then ships them back. The ones who have done it report awesome results.
The other way is through caponizing, or "neutering" once a roo that has never crowed is caponized he does not start crowing, if he already crows he may stop entirely, and if he does not it is not as vocal or often, not w/ any "gusto" at all. He will continue to grow the rooster feathers and look, but will not be interested in mating and will be sterile.
Both procedures are very safe when done by someone who knows what they are doing. My caponizing mentor has done several hundred ranging from 4 weeks to 1 year old w/ only 1 loss. I have done around 20 w/ no losses.