Yes but on the other hand, some dogs can and do regularly slip out of collars. My golden has always been very anxious and has slipped his collar a number of times because he gets scared and backs up unexpectedly and suddenly he’s collarless. I use a slip lead now because he cannot back out of it. Animals are not dying because of vets using slip leads, this seems like a ridiculous reason for a regulation like this. Animals can choke themselves on a normal collar just as easily.