From what I seem to have read, the 2 bullies are the 3 year old, untrained horses. They need a proper daily training program. You might want to send them out to local trainer for a 30-60 day program. I might suggest you contact James and Lisa Ferguson from Sanger, Texas Equines by Design - Home | Facebook. They are mule people but are well connected in the industry. I have purchased a very well trained mule from Lisa years ago.