Respiratory sampling
Horses that were not racing or competing within 10 days following
sampling were sedated with detomidine (10 µg/kg IV, Sedomidine,
Audevard), with the addition of butorphanol (10-20 µg/kg IV, Torphadine,
Dechra) when needed. A nose twitch was used when necessary. For horses
racing or competing within 4 to 10 days following investigation, the
procedures were achieved with a nose twitch only, without sedation
because of drug testing considerations.