Naturalist Casey Anderson ventures into the Alaskan wilderness to study the biggest bears on the planet - and pick up fishing tips for his bear pal. Brutus the grizzly bear enjoys his 25,000-calorie breakfast , 35 pounds of treats such as raw chickens or carrot cake, but when his human best friend, naturalist Casey Anderson, presents him with a fresh, flopping fish, Brutus is confused and uninterested.