Or as Hornady puts it......

The best ammunition for personal defense just got better with the addition of Critical Defense® Rifle. Critical Defense® is engineered to deliver the pinnacle of threat-stopping power.

The FTX® — at the forefront of Critical Defense® — maximizes the potential of a hollow point bullet. Its patented Flex Tip® aids expansion and eliminates clogging when passing through clothing. Nickel-plated cases increase visibility in low light situations.
Low-flash propellants won’t disrupt night vision and deliver consistent performance, every time. 

Though I'm not sure why a bunny would be wearing clothing anyway...