Complex sentence: When the bird did not die, Mr. Olsen, who was surprised, decided to continue to care permanently for Mike, feeding him a mixture of milk and water via an eyedropper; he was also fed small grains of corn.
Split into simpler sentences: When the bird did not die, Mr. Olsen, surprised, decided to continue to care permanently for Mike. He fed the bird a mixture of milk and water via an eyedropper, and gave it small grains of corn.