Is Portulaca Safe for Horses?
Quick answer
Portulaca contains compounds harmful to horses. ASPCA lists Portulaca (Portulaca oleracea - purslane is related) as toxic to cats and dogs, causing kidney failure in cats particularly. Portulaca grandiflora contains soluble oxalates. Keep away from all pets.

Is Portulaca safe for horses?
Toxic(moderate)
Portulaca contains compounds harmful to horses. ASPCA lists Portulaca (Portulaca oleracea - purslane is related) as toxic to cats and dogs, causing kidney failure in cats particularly. Portulaca grandiflora contains soluble oxalates. Keep away from all pets.
Sources
- ASPCA Animal Poison Control - Pet toxicity classification
Disclaimer: This page is for general information only and is not veterinary advice. If your horses ate Portulaca, contact your veterinarian or animal poison control immediately.