This video deals with the retraining of donkeys that have difficulties with leading, standing still and refusing to move, the use of positive reinforcement and negative reinforcement and the process of shaping behaviour at the start of the training programme.
http://www.thedonkeysanctuary.org.uk/training-centre
The Donkey Sanctuary is an international animal welfare charity, based in the UK, working to protect and care for donkeys and mules.