A 1,000-pound animal has to consume significantly higher quantities of a toxic plant than a smaller animal to be affected clinically, however some plants are cause for concern and all poisonous plants are worth recognizing so they can be removed from your horse-keeping areas. Another commonly overlooked reason a horse may become poisoned is allowing horses to graze a pasture after it has been sprayed with herbicide, but before the weeds have died and disappeared.

The study began with the goal of detecting a panel of viral and bacterial pathogens in horses, including those that cause severe respiratory illnesses similar to those presented in COVID-19, the researchers said.