HI Laura! Only me! His response is due to a bit of complicated (or at least I think it is!) physiology. Heather will be able to help you with this. I think its called active feed foraging and is due to a release of ACTH. Very similar to a stress response, in fact I think it is the same! But good stress instead of bad stress. Ohh I'm soo technical!
Anyway back to the practicalities of staying safe. I guess cunningly placed barrels will help. Or perhaps training a calm behaviour inbetween bouts of excitement so that you don't have him galloping towards you full pelt for his treat.
Change the reinforcement schedule?
Hmmm, need to think about this one....
Lucy.