Starting August 15, 2011, testing for clenbuterol in Ontario Quarter Horse racing is expanding to include a 30 day withdrawal period and lower threshold levels. This expansion by the Ontario Racing Commission (ORC) will complement the existing efforts of the …

With the support of the Quarter Racing Owners of Ontario Inc (QROOI), the Ontario Racing Commission (ORC) has launched an initiative to conduct random out-of-competition testing for the presence of clenbuterol in quarter horses, commencing July 1, 2011. Clenbuterol is …