There aren't any slaughter houses open in the US yet for horse slaughter. The news articles say that there might be some opening up with in 30-90 days.
All horse meat intended for human consumption (that I know of) is shipped outside of the country for because there isn't much of a market for horse meat in the US except for zoos and that type of thing. In fact, your state of Florida has a huge problem with black-market horsemeat for human consumption. Over the past couple of years there have been horrific news articles of valuable animals being stolen and butchered for black-market horsemeat in Florida.
There are 4 states in the US that have state laws preventing slaughter of horses. Other states are considering opening up slaughter houses - Nebraska, Wyoming, and Missouri are some that were in the news.
The sad truth is that horses are going to be slaughtered whether it is in the US or Canada or Mexico. I am STRONGLY in favor of having it legalized in the US for 3 important reasons: 1) there are greater odds that the slaughter will be humanely done, and the horses won't have to cross continents on their final journey, and that is very important to me; 2) the value of horses will go up which is good for the horse industry as well as individual horse owners; and 3) if my horse is stolen there is a greater chance that I will get her back if there are US slaughterhouses, vs the chance that she could be taken out of the country.
Just my thoughts.....