Are tent caterpillars poisonous?
Generally no. The hairs on the tent caterpillar can be irritating. Animals (and children) may react adversely if caterpillars are eaten (eating tent caterpillars is not recommended). Back East in Kentucky, there is a phenomenon occurring right now known as Mare Reproductive Loss Syndrome. Kentucky has been experiencing an unusual amount of abortion by mares (female horses). It is related to an outbreak of eastern tent caterpillars. I do not believe we currently have to worry about this in Whatcom County. To learn more about this, click here.