Another word for high-strung

In general, a dog that is relatively calm is more likely to tolerate a costume than a high-strung animal.

In 1876 Clifford, a man of high-strung and athletic, but not robust, physique, began to fall into ill-health, and after two voyages to the South, died during the third of pulmonary consumption at Madeira, on the 3rd of March 1879, leaving his widow with two daughters.

This psychic ability can make the child high-strung and overly-emotional.

His spiritual nature was high-strung and delicate; and this condition was aggravated by his constant study, his long fasts and his frequent vigils - in one year, according to his diary, he kept sixty fasts and twenty vigils.

Yes, Howie is... high strung.