My young Rottweiler attacked the vet and the animal hospital staff when I took him in to be neutered, is he going to turn on me one day?

I don't judge young dogs on their behavior at the vet because many vet employees don't understand how to handle a strong working dog that is nervous or scared. For a vet to recommend you turn a dog into rescue based on a fearful reaction to handling by strangers in a clinic setting is unreasonable in my experience. Honestly, I'd be looking for a new vet.

I would teach him how to wear a muzzle comfortably so you have a way to reassure staff or anyone that would need to treat him in the future. I teach all my dogs this skill anyway, you never know when it will come in handy.

All dogs react to stress differently so it may be that he just felt cornered or trapped, I worked in a vet clinic for many years and saw a lot of dogs react in this way when they were scared. That's not to say this isn't a dangerous situation but for a vet to suggest that you surrender him to rescue because of his behavior at the clinic is a problem for me.

There's no way to predict what a dog will do in the future but smart training and setting boundaries for all dogs is the way to go, especially strong and powerful dogs like Rottweilers. My mom bred Rottweilers so I'm familiar with them, they can definitely be a challenge, especially during adolescence.. I'll link some training resources for you below. If you need help choosing a muzzle our staff can help with that. In the meantime, if you can find someone local with experience training powerful working breeds to help you I would suggest that as well.