On May 5, 2006, a television producer for the TV series 8 Simple Rules filed a lawsuit against Millan, claiming that his labrador retriever had been seriously injured while at Millan's training facility during an exercise routine on a treadmill.[21]. National Geographic released a statement that Millan was not present at the facility at the time of the alleged incident.
This is what I found on this site:
http://www.answers.com/topic/cesar-millan