In 1950 we moved to a farm in Cardiff township, Haliburton County, Ontario, and took our cats (Felis domestica). These were three emasculated males and a female. One of the males brought into the house practically all his catch, and the female, when she was nursing kittens, brought in about half her prey. The other two cats were catching small mammals but they never brought anything to the house. Our cats, from December to April, ate the contents of two 12 ounce cans of food each day, six ounces to a cat every twenty-four hours. From April to December one 12 ounce can was fed every forty-eight hours, one and a half ounces each day, to each cat. They preferred catching their own food if they could. Prolonged spells of cold wet weather made them demand more food. Though there were many small...