A good prong collar is usually a combination of different materials to achieve the same task. If you want to ensure that your dog doesn't hurt your plants, then a prong collar should be fine.  But if you want a stronger collar, you should go for a Kevlar one, which comes with extra strength for added safety. But it would be best if you didn't use it on a dog more than once a year. A good prong collar is usually a combination of different materials to achieve the same task. If you want to ensure that your dog doesn't hurt your plants, then a prong collar should be fine.  But if you want a stronger collar, you should go for a Kevlar one, which comes with extra strength for added safety. But it would be best if you didn't use it on a dog more than once a year.