Southern by choice
Herd Master
As for when, and your vet says they have to be big enough to get hold of, it's probably because it's easier for him to hold them and maneuver the head/horns while removing them. Much harder to deal with if you can't get a'hold of them I imagine.
That isn't how the procedure works.
Few have had this procedure done. When we did this our vet sedated but WE assisted. Having gone through this personally I would NOT hesitate to do this again if necessary. Having said that I have a buck whose scurs are massive- it was in the article. We use gigli wire on him and they are blunted horns basically. The breeder disbudded and that is how he came, with scurs.
Disbudding by any breeder no matter how long they have been doing it is difficult with bucklings. More end up with scurs than don't. I will not dehorn this buck of mine but keep the strange growth in check.
Banding has been done and updates given by @BlessedWithGoats and @OneFineAcre . Their experiences really helped me to have a better understanding. I thought it to be a horrible blah blah blah... because that is what I'd "heard". Their experiences have been contrary to what I had heard.
I tagged them in this post so maybe they will share the link or you can do a search and read aboit it. It may be a better option.
BTW- I am not a fan of declawing... but I agree... rather see a cat declawed then it ending up in a shelter because of the destruction they can bring in a house. What's better 15 years of a cushy life with no claws or dumped because it destroys the place. I think the cushy life is better!