I have been doing agility with my first dog for about 6 years now, and my 2nd for a year and a half. When my 2nd dog started, he had really good contacts, but as he has gotten more confident, he has gotten cocky and jumps off them without touching. He does them fine at training, but as soon as I get in the ring, it´s a different story. We do the 2 on 2 off method. Any ideas on how to beat this little trick of his?