I don't know either RG and JM. But of course I have heard the stories. Guerfien did more vet work on his horses than any trainer in history. Sometimes 3-10 a week on one horse. They had it and they wanted the stallions to produce on track so they could get the stud fee.
And Marks, all i hear is JM is not a good person. But has ability to get a horse to go fast and pain free with chemicals. And another guy who has had ties with Ontario's biggest rat RF.