I have impressed upon Denver that if there's any indication it's (abuse) intentional, go for state prosecution.
Cruelty to animals needs to be a matter of public concern as it directly affect public safety and human welfare. It can no longer be perceived of as merely an issue of animal welfare.
The earlier we intervene, the better off the community is and the (abusive) individual. The way we break this cycle is education, intervention and collaboration.
The days of 'boys will be boys' or, 'it's just a dog or a stray cat' are over.