Transient unilateral Horner's syndrome after epidural ropivacaine in a dog

The epidural injection of 0.22 mL kg−1 ropivacaine (0.75%) in 0.01 mL kg−1 of saline during isoflurane anaesthesia caused unilateral (left) Horner's syndrome in a 4-year-old female, neutered Beagle dog.