These plants are toxic to cattle, sheep, goats and rabbits. The toxic agent is unknown, although it is believed that an animal must eat about one-third of its weight in caltrop to be poisoned.

What animal eats caltrop?

Sheep readily eat it, but there have been a number of confirmed cases of caltrop poisoning in sheep and goats. Caltrop is a nuisance around farm buildings, townsites, railway yards, roadsides, car parks, cycle paths and other recreation areas because of the sharp spiny burrs.

How do I get rid of caltrop?

"Small caltrop infestation can be physically removed by grubbing or digging plants from the central tap root. It is important the weed is bagged and placed in the red bin, not the green bin, this will prevent the spread of the weed. If a bin service is unavailable incineration is also a good option.