Well, if we are going to put them on a level with cats and dogs as pets, we should euthanize them in mass numbers to help(not very effectively) control the populations like dogs and cats, and discard all that good meat. That meat could be used though not if it is chemically contaminated. Use the meat for dog food. Use the meat to feed the carnivores at zoos and wildlife rescues. It doesn't have to be for human consumption. I for one would like to be able to afford a dog food with higher "real meat" content. If horse meat brought prices down and quality up on my dog food, you BET I'd be buying.
I really wish eating horse was not taboo in this country. Horses are livestock. Some are worthy of "pet" status, but definitely not all.