The days of gluttony are over for one fat cat out east. Tiny, a 30-pound house cat, was stuffed into a duct-taped box with a normal-sized cat one-third his size and dumped at an animal clinic in Fredericton, N.B., shortly before the New Year. Nancy Garon, Tiny’s foster mother, brought him home to get him in shape. So she has him chasing a laser dot, which he never catches, wrestling with a toy fishing pole and hunting rodents. He will lumber onto the scales every Tuesday as part of a weight loss challenge to raise funds for the Society for...