I think he means with the rubber ban on the tail thing, no I would never do that to a dog, and a cat with no tail is born that way usually you have a vet dock a pups tail with a knife, but some do use a band.
I forget who posts or used to post on here that bands the tail. I know people who band bull calfs as their only way of castrating. I am sure any one can band any thing off they want, but I don't know of it being done. I think weirdo people have done things like that to themselves, but I wouldn't reccommend it.
We have banded here at our farm on the jersey bull calves. Until one time when he coughed up his cud and his one teste went back up. The vet had to come out and remove it and it was costier than him coming out and just taking it all at the same time.
wouldn't recommend doing a dog or cat though. Dogs and cats have completely different reproductive systems (as in where the certain parts are at and connect to the body type of thing) than cattle.