Yes, shock collars do hurt dogs - unlike training collars. A dog may not yelp when they are hurt, but they can still be in pain. Similarly, there may be no signs on their skin that they have been harmed by the electric shock. This is because the damage caused is actually deep in the tissue, and it is left to grow worse the more the shock collar is used.  dog training tips
To communicate clearly and consistently with your dog, you need to understand how she learns. Dogs learn through the immediate consequences of their behavior. The nature of those consequences determines how they’ll behave in the future. Dogs, like other animals (people included), work to get good things and avoid bad things in life. If a behavior results in something rewarding-like food, a good belly rub, playtime with dog buddies or a game of fetch with her pet parent-your dog will do that behavior more often. On the other hand, if a behavior results in an unpleasant consequence-like being ignored or losing things she finds rewarding-she’ll do that behavior less often. click here

It’s best not to punish the puppy for making a mistake. Instead, focus on praising appropriate bathroom behavior. If you catch your puppy in the act, interrupt it by saying “No!” in a firm voice or clapping your hands loudly, then take the puppy outside to finish going to the bathroom. Never swat your puppy, yell at it, or try to rub its nose in the mess. how to potty train a puppy
The range on this collar is nearly 800 yards. It’s an appropriate choice for training any dog from 15-120 pounds and puppy to fully-grown dog. The collar is adjustable in length and the unit’s mini-size allows you to use on your dog for extended periods of time without it bothering him. That in itself will go a long way towards training but the ease of use with the remote control will be sure to tip the scales in favor of this collar.
7)      Bone up on supervision.  The hardest part of the housetraining a little one is the supervision. Often full house freedom is granted too soon!  Think your puppy or dog has got it? Give this system a full month and even then only grant the rooms you’re in one at a time. Continue to seclude your dog or puppy in a crate or gated area when you leave, walk him through the house with you on leash so he learns to stay with you versus stray, and make a consistent scene over taking him “Outside” or to the “Papers” to “Get Busy.” 
Consistency is crucial. This may mean taking time off work to be there to take the pup outside every 20-30 minutes when they are awake. Crate training will also help the 'penny drop' as it teaches the pup to hold on until taken outside. Then, be sure to stay with the pup in the yard so you are there to reinforce how clever they are when they do go in the right place. dog training tips

Martingale collars are the humane successor to the choke chains of old. They operate in a similar fashion, with the collar tightening when your dog starts to pull. But because of the limited closure, it’s much safer and won’t actually choke your dog—just adjust to the size of their neck. For that reason, it’s also a great choice for pet owners whose dogs have a habit of slipping out of their leash. how to potty train a puppy
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