We always give tetanus when we castrate. We've been told too, by our vet to do this specially for the bigger calves. We castrate at around 5 months.
And to the people who think that the bigger calves walk around with a rotting sack for a month. They do smell a bit the second week, but after that they dry up. The last 2 weeks of that month the testicles are mummified and dry. When we started banding instead of cutting, we bought this super duper bander with these special bands. Those looked so painful. It has this ratchet like device, crimpers and big rubber tubing...I couldnt stand using them. I started using the small green bands on them and although a little tricky getting them over the bigger calfs nuts, its not impossible. They have a little discomfort for a few hours but go back to being calves before we let them out of the corral..