Complex sentence: For instance, it is well known that a vermin's bite to the working dog's flop ears can lead to a systemic infection, a serious medical problem that wouldn't occur were there no flop ears to be bitten.
Split into simpler sentences: For instance, it is well known that a vermin's bite to the working dog's flop ears can lead to a systemic infection. A serious medical problem that wouldn't occur were there no flop ears to be bitten.