It would be cruel to respond to their affection with painful corrections. (dogstardaily.com)
Regardless of the action or intent of the dog, he will get a physical and sometimes painful correction from the collar. (petpeoplesplace.com)
This trainer may do so with painful corrections and «negative reinforcement», though, and will likely not disclose the well - documented side effects of training this way. (academyfordogtrainers.com)