Any scene with Dinky, Boomer, and the caterpillar.
Chief has a funny moment too, milking his broken leg for all it's worth. Though it fails in the end when Amos threatens to break the other leg.
Chief and Amos chasing Tod around the farmhouse, which leads to Chief scooping up chickens, finding himself marooned in the water, etc. It all ends with Widow blasting out Amos' radiator with his own shotgun when he takes the chase too far.