T   back to resource centre home   Toxicity By Horse SA www.horsesa.asn.au and the Mount Lofty Ranges Catchment Program www.mlrcp.sa.gov.au Numerous plants contain toxins which can poison horses. Symptoms: Staggering, pronounced salivation, muscular tremors, inco-ordination of movement, convulsive seizures, sudden death. What to do: Contact your veterinarian, keep animals quiet, remove to clean yard or holding paddock, identify likely problem plants. Land management: Follow an integrated weed control strategy, graze a mixture of pasture species, seek professional advice.