several years ago we were out with a lamp and our deerhound (yes its true!) and she chased a roe buck round a field.....suddenly the ro buck stopped dead, turned to face her, stamped his foot and took after her....well youve never seen a dog run so fast in your life....he chased her twice round a fair sized fields then they disappeared over a rise...we ran to catch them up only to find the two of them lying side by side panting exhausted. we couldnt stop laughing and toop pity on the buck, and off he went on his way after a 5 minute lie down ever since then shes been terrified of deer at nig