tortoise
Wild Hare
Ivermectin and spinosad are not universally safe for dogs. Dogs with the MDR1 gene can't excrete macrocyclic lactones (which includes ivermectin and spinosaid and others) which causes toxicity. Most breeds that carry MDR1 gene are in the herding group, but there are others. (There is testing available to identify the mutation) MDR1 gene is associated with white paws, hence the saying "white feet, dont treat."@Medicine Woman - Thanks!