Hmmm, why communication, grammar and punctuation are so important.
"Hi guys, recently i noticed that my dog's prong collar is not that effective." This statement gives the impression that the collar is not effective, thus it is being used and has lost its charm.
"When i'm giving a correction he's not even feeling it." This statement gives the impression that you are looking for your dog to yelp or otherwise indicate that he indeed has felt the correction. Which gives others the impression that the dog has been 'yanked and cranked' until he is work-hardened.
"And since he wears the prong he got half of his neck shaved.(Like it pulled a lot of hair from around his neck)" At first, here I thought that since we started using the prong collar, the dog had a hot spot or injury and needed to have his neck half-shaved. (My pup had a hot spot and got her neck half-shaved.) But the partial sentence within the parenthesis seems to clarify that the collar itself is causing the hair loss.
"Any recommendations for a strong correction collar that won't shave his neck like the prong does?" Now for this statement, are we asking for a collar that can deliver strong corrections, or a strong collar that can deliver a correction?
Because it sounds like the story has changed now, and the collar is only used for minutes in the day, and the only used in the case of a dog snarling at the dog or a cat jumping out, I am thinking that it must be how the original statements were worded that gave us all the wrong impression.
I really do want to know though, are you looking for a collar that can deliver strong corrections, or are you looking for a strong collar that can deliver a correction, in whichever case that will not affect the dog's hair around the neck?
You might want to try a chain martingale. You do not want a choke chain -- people have told you that they can injure your dog, well they can. If you choke your dog out with one until it is unconscious as some trainers used to do, it can cause serious damage. They can also be used effectively and safely. But if you are looking for your dog to indicate he has felt the correction, it is probably not the right collar for you.
A chain martingale, with small links -- think horses, the thick bit is easier on the horse, the thin bit gives more control. Small links will put the same pressure on a smaller area and will deliver more of a correction than the same action with larger links.
Martingales are not necessarily correction collars. They are no-slip collars. But they are designed just like a prong collar, without the prongs. They can only tighten so far, so you cannot choke-out a dog with them. And the pressure will tighten all around the neck like a prong.
Usually martingales have a small chain or nylon area that does the tightening/loosening -- the chain noise is desireable and lets the dog know that he is pulling, and a larger area that is fixed around the dog's neck, usually made of leather or nylon. There are some made in all chain though. And if you are concerned with the wear around the dog's neck, chain might be easier on the dog's neck that nylon or even leather.