James Law, Text book of veterinary medicine… (1902)
“ They will hide under the litter in the darkest corner but soon start without apparent cause, turn around and lie down again, or they bound up with grunt or scream and rush off as if pursued, push or leap against the wall, stand with ears pricked as if listening, and start violently at any noise or a flash from a lantern, trembling, squealing, or having muscular jerking. ”
