POP QUIZ ANSWER
e. Any of these could be a sign that a horse has ingested a toxic plant. Dark mucous membranes are a common indicator of red maple poisoning, while locoweed toxicity can lead to a distinct high-stepping gait. Ingestion of many types of toxic plants can cause diarrhea and/or erratic heart rates. As a general rule, your veterinarian will consider plant toxicity whenever a horse suddenly develops unusual and/or dramatic signs of illness.