I never got the hang of a clicker. I know I have one some place.
I don't know if the K9s use them when they are working, but they certainly do when they are training. I have seen them, even on old and retired k9s, they use the prongs regularly.
Years ago I had a trainer put a prong on a dog and show me how to do a good correction. That was a one day seminar, and by the end of the class hour, the dog was doing better. I had another trainer take the same dog, and demand removal of the prong, and use of a halti. The dog HATED the halti, and kept slipping it to boot.
Eventhough I am not a fan, nor a user of prong collars, which trainer did I have more respect for? Which trainer is more respected in the area? Which trainer did I show with, and did I place under a judge when she did not? And at another show did I place with two dogs, two venues, when she was NQ'd. Ah, yes. use or non-use of certain tools does not make you a good or bad trainer. I think 95% of the dogs in my current trainer's classes use prongs, and that trainer is by far the best trainer I have worked with thus far, but I don't use a prong in her classes, and she doesn't push it.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC