How awful.
Here in Miami Co, KS we had a similiar thing w/ just about 200+ Hackney Ponies back in 1998.
Someone contact Kansas State University Veterinary School. They were very helpful w/ the Miami Co Ponies in getting first aid, triage and a treatment plan developed. Ditto the Kansas Horse Council.
Here is how it seems to work:
The owner may be given the option to "clean things up" within a specific time frame. Failure to meet the changes by the deadlines could cause him/her to loose the mini's to the county. However, a county rarely wants to gain control over the animals because then the taxpayers must foot the vet & food bills until the animals are sold. The county will work with the owner and exhaust that avenue first.
The owner may willingly give up control of the animals to the county who might appointment someone to manage their care & placement. This is where a registered rescue group w/ correct paperwork can be helpful.
Thoughtful letters to the County Attorney can be effective. The Sheriff just enforces the laws on the books, the Attorney cements the charges. Attorney's have egos so emphasis is on "thoughtful" because no one likes to be spanked. There is most probably no formal SPCA or Humane Society down in that area. Based on the debri piled up and laws on the books it's probably a easier chance to get the owner rung up w/ envioronmental violations.
The above is my personal observation w/ the Miami County Hackney's. Google it and Norman or Nueman Sterns for details. HorseAid was the illegit rescue that intervened and caught the attention of the KS Attorney Generals office, this was after the fact, the ponies were gone and so was $200,000. If you google HorseAid & the ponies you have to digest their version w/ a lump of salt.
I can tell you Channel 9 is the T.V. station that is best in the KC metro. The others are weak.
I've been in Uniontown and it is a small town.