Complex sentence: Additional care is needed if shrimp are used as food, as smaller red-eared sliders (less than a year old) have been known to choke on the shells of the shrimp and suffer from lung puncture.
Split into simpler sentences: Additional care is needed if shrimp are used as food. Smaller red-eared sliders less than a year old have been known to choke on the shells of the shrimp and suffer from lung puncture.