There were three pets that Columcille had; a cat, and a wren, and a fly. And he understood the speech of each of those creatures. And the Lord sent messages to him by them, and he understood all from them as he would understand an angel or human folk that might be sent with a message to him. And it happed that the wren ate the fly, and the cat ate the wren. And Columcille spake by the spirit of prophecy, and he said that it was thus men should do in a later time: the strong of them should eat the weak, that is to say, should take his wealth and his gear from him, and should show him neither right nor justice. And Columcille said that the while the Gael of Erin were thus, the power of foreigners should be over them, and whenever right and justice were kept by them, they should themselves have power again. And such love had Columcille for those little creatures of his, that he asked God to revive them for him, to get back the fly from the wren, and the wren from the cat. And he obtained that from God. And they were with him thenceforth as they were before, till they had lived out their lives according to nature. Wherefore he made this quatrain:
The deed they have done.
If God wills it, may He hear me:
May he get from my cat my wren;
May he get from my wren my fly.
— Betha Colaim Chille (Life of Columcille),
X. Of Sundry Miracles and Prophecies of Columcille and of Certain Visions, 118;
compiled by Manus O’Donnell in 1532; edited and translated from manuscript Rawlinson B. 514 in the Bodleian Library, Oxford.