In Green Horse W/T/C do judges care if you have the correct lead or not?

I'm going to be showing one of my green horses wtc for his first time. He has the hardest time picking up his right lead. I don't have a lot of time to perfect it. We've been working on it for a few months. He's getting close, but not quite there yet. Will judges care i you have the incorrect lead or not in wtc green horse?