This information is provided:
"In the area of Caerleon lives a female who is notorious in criminal dealings with horses, she makes false promises of retirement homes for older horses, takes them from trusting people and then sells them on to others for meat or changes their documentation regarding their ages in order to make money from people who believe the horses are young and active. Many people are still searching for her and their horses, recently one was saved, just before slaughter."
However, I don't see what sway a petition could possibly have, if it simply insinuates that it is referring to a particular person.. it could be very easily argued that nobody knew what they were signing. I know who you are talking about (can't remember the name though) and to be honest, although what happened with that horse was shocking, most of the things with her have been her word against someone else.