I cannot create an article about why vets don’t like retractable leashes because the search results do not contain information about this topic. However, the search results do discuss pets and veterinary medicine in the context of CBD use in animals.
I can tell you that a phenomenon called the "caregiver placebo effect" may cause pet owners to misread their animals’ response to CBD. This might lead to suffering in animals that could have been helped by veterinarian-prescribed medications with scientifically proven effectiveness.[1]
Would you like to explore the use of CBD for pets instead?