It is not acceptable to use a shock collar on a dog and call it "training". It is beyond insulting to me, my colleagues, my mentors, my industry. It infuriates me to see it time and again. How anyone can think that sending an electric current through a dog's neck or genitals is an acceptable way to teach another sentient being how to "behave" is beyond me. It's the person holding the remote who needs to learn how to behave appropriately, as far as I'm concerned.
Most dogs have some annoying habits. We humans want them to stop as quickly as possible.
Some humans have a little handheld tool they use to stop behaviours they don’t like: a squirt bottle. A sharp spray of water in the dog’s face should stop jumping/chewing/nipping/barking pretty efficiently, right? Plus the gadget is cheap, easy to get and shouldn’t really hurt the dog, right? Well, not in my opinion.