Cry to the Moon — Joyce Stranger

The wildcat must contend with the weather and her natural enemies as well as the animosity of Alastair and lan, but she finds a friend in Alastair's twenty-year-old daughter, Sheina, who watches secretly over her and christens her Hexa. Rob Vincent, who inherits the next door farm and turns it into a wildlife sanctuary -- which does not endear him to the two keepers -- works with Sheina to protect Hexa. When they rescue one of her injured kittens and attempt to tame it, the kitten -- and the secret of Rob and Sheina's friendship -- must be kept from Sheina's father.