S15E05 The Fat and the Furriest
Homer is attacked at the dump by a grizzly bear. He is mocked for his fear of the bear and develops a phobia of bears in general,even cuddly toy ones. Grampa persuades him that the only cure is to confront the bear - which Homer does,discovering that the bear is angry because of an electric prod in his ear. When Homer removes it the two become friends and Homer helps the bear escape to an animal sanctuary.