I would say breeze it by itself, and just let it run maybe if the horse realized there is nothing more interesting out on the track he will listen, but if he still thinks there is something else out there, he will never consentrate--if you let him look, maybe he won;t.
Worked for me.
~A truly Fancy Pirate-Pirate-By All Time Fancy-Bay overo yearling.
~Mia-6 year old Thoroughbred mare. Ex polo Pony