I don’t know what he’s been charged with - I haven’t seen the charges delineated.
You seem to be conflating a lot of concerns that aren’t mentioned in the article.
Do you simply believe that police should not use dogs at all?
Harming, or attempting to harm a police dog (or any other dog. really) is and ought to be a crime. It’s not the same as harming, or attempting to harm a police officer. however. Can they spay or neuter anyone on the police force? Probably not. (I said ”can,” not “should.”