I have used prong collars when needed over 20 years. I don't think any of my dogs have negative associations with the collar. The 2 older dogs go out with plain collars on now but I still use the prong on Lakota because she will get over the top with deer or squirrels, instead of her lunging forward she will jump straight up. I'd rather have her doing that than choking herself.
Apache - Shiloh Shepherd 12/15/02
Kiya - Shiloh Shepherd 5/15/04
Lakota - WGSD 1/13/10