If a choke collar/prong is used correctly it should not harm your dog. The choke can be used as a training tool/for walking
strong dogs. If not used correctly
that can cause harm to the dog. It should Never be used as a regular collar.

I use a harness for my little dog,
because she pulls.
I use a thick Greyhound collar for my
female Akita and a choke collar
for my male.
I never leave either one of these collars on my dogs when they are not being walked.