Actually that is not how it was done, I love the story but like all things it took alot of work and some real love between trainers and animals to make it work.
Below is the webpage of the person who created it click on the bear then click the titles. It was very interesting to learn what went into this touching story. I can imaging there were many frayed nerves in the making of this. Some of the pictures of the country side that they filmed in are beautiful. Bart (the big bear) was 2000 lbs and stood 9feet 2 inches tall. He was a celebrity in his own right. When traveling he had a list of demands that any diva today would have been jealous of.
Thanks for posting it
http://www.jjannaud.com/index_en.htm