Recently I persuaded a local pet supply store owner to sell me all his choke collars (at cost) and refrain from restocking them, in return for recommendations for safe body harnesses such as Perfect Fit and Balance. He was persuaded by data I presented to him about the pathology of choke collars.“I never knew they hurt dogs, and only carried them because people asked for them.”
I never knew either, years ago when I went to a trainer seeking help with my Labrador, Jake. She told me to use a choke collar. Neither Jake or I liked the choke collar, it never helped in any way, and I quickly put it away.
Pet owners cannot be expected to know about the harmful consequences of using equipment unless they are informed.