Plants toxic to horses
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Take a look at photos of plants that are toxic to horses. Presented by Loomis Basin Equine Medical Clinic.
Plants toxic to horses
- 1. Toxic Plants Possibly Pretty but Dont Touch or Eat Bob Morgan, DVM
- 2. Type of Problems for Horses 1. Mechanical Irritation 2. Internal Poisoning 3. Unexpected Consequences
- 6. Mechanical Irritation Yellow Star Thistle
- 9. Internal Poisoning (cases in descending order) CAHFS 1990-2007
- 10. Oleander
- 11. Oleander 1. All parts of plant are toxic 2. Plant contains Oleadrin(a cardio- toxin) 3. ~ 20 Leaves can be fatal to adult Eq. 4. Signs of ingestion may include: depression, weakness, irregular heartbeat, diarrhea, and sudden death.
- 12. Oleander-Treatment ECG exam Cardiac supportive drugs IV fluids Gastric lavage and adsorbents
- 14. Yellow Star Thistle Toxic principle is a complex compound that liquifies a portion of the brain which controls prehension. Clinical signs include: weakness, lethargy, and incoordinted actions of the lips and tongue.
- 15. Yellow Star Thistle 1. Most cases die of starvation. 2. No effective treatment. 3. If on YST pasture, feed aggressively. 4. ~600# of plant causes clinical signs
- 16. Pyrrolizidine Alkaloid Toxicity Common Groundsel Fiddleneck These plant are often incorporated in first cutting hay from California
- 17. Pyrrolizidine Alkaloid Toxicity Inspect hay for signs of PA containing plants.
- 18. PA Toxicity 1.Weight loss 2. Lethargy 3. Poor Appetite 4. Icterus (Jaundice) 5. Dark colored urine Toxicity can occur with ingestion of as little of 12# of plant over time.
- 19. PA Toxicity Prognosis depends severity of liver damage(liver fibrosis). No specific treatment. Bloodwork, liver biopsy, and behavior will aid in judging severity.
- 20. Unintended Consequences Non-toxic weeds: dandelion, filaree, red clover, and mallow can concentrate sugars and fructans posing a risk for laminitis. This can also be true of other pasture grasses on warm afternoons and after a heavy frost. Restrict laminitis prone Eq. from these pastures or use grazing muzzle.
- 21. Unintended Consequences Acorns/Oak All parts of oak contain tanins/phenols which can lead to GI upset and colic; can be problem for EQ predisposed to laminitis. Large amounts consumed for 2-3days in a row or longer are problematic
- 22. Take Home Points Provide adequate, good quality feed. Identify and remove known toxic plants. If poisoning is suspected, contact the clinic. The patient and the plant should be examined.
- 23. Extra Credit
- 24. Extra Credit