I'll take it a step further. The responsibility also lies with the so called breeders. I'll give you an example why I aay that. I have Presa. There's a breeder in Canada that has them. He advertise them as being very large and breeds hus dogs to be excessively large. Since the is no standard for how heavy they can be it is within standard. But they had a stud. He couldn't jump in the back of a pickup. He was their main stud. That's not a dog IMO that is functional for anything. He's huge and most people will avoid your yard if he's present. Either the hips are bad or it was just too heavy. He contacted me once looking for a large female to add to his program. I made some excuse as to why she wasn't available.