Ryegrass staggers is a neurological condition that can be seen in most domestic grazing species, including horses. It occurs most commonly in late spring to early autumn and always in animals grazing perennial ryegrass pastures …

Heat stress can occur in all horses, and can occur over a relatively short period of time, particularly in the case of unfit athletes worked strenuously in high ambient temperatures, or can occur from protracted fluid and electrolyte loss during exhaustive exercise …