Today's true sports drinks are still the classic Gatorade -- packed with the electrolytes potassium, magnesium, calcium, and sodium to provide energy during intense workouts -- as well as competitors such as Cytomax, Allsport, and Accelerade.
Certain medications can also cause Charley horse as a result of their side effects. Drugs such as statins or medicines prescribed for lowering cholesterol, blood pressure, diuretics, asthma medicines like terbutaline and salbutamol, morphine and lithium can trigger muscle spasms.
There is no answer as to why Rosie developed canker. Because the disease involves a very strict anaerobic process, and seems to have multi-factorial pathogenesis, the true cause of canker is unknown. It is widely thought of as an external infection but horses with systemic or constitutional upset are more susceptible.